Land > North America

States	Quadrangles	Hydrologic units (2-digit regions)
Geographic subdivisions: Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

Geochemical landscape of the conterminous US: maps of NURE-HSSR data [New Window]

Maps derived from a subset of the National Uranium Resource Evaluation Hydrogeochemical and Stream Sediment Reconnaissance data. Samples are from streams, lakes, ponds, springs, playas, and soils. Includes Na, Ti, Fe, Cu, Zn, As, Ce, Hf, Pb, Th, and U.

Bouguer gravity anomaly grid for the conterminous US [New Window]

Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. This digital grid describes the Bouguer gravity anomaly for the conterminous US.

Value of mineral production by state in the US [New Window]

The value of mineral production by state in the United States. The data represent commodities covered by the Minerals Information Team (MIT) of the U.S. Geological Survey.

Geology of the conterminous United States [New Window]

A digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b). It excludes Alaska and Hawaii.

Isostatic residual gravity anomaly grid for the conterminous US [New Window]

Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. This digital grid describes the isostatic residual gravity anomaly for the conterminous US.

Terrestrial radioactivity and gamma-ray exposure in the United States and Canada [New Window]

Data generated by aerial sensing of radiation emanating from the earth's surface provides general estimates of the geographic distribution of Uranium, Thorium, and Potassium in surficial and bedrock units. Covers the conterminous United States, southeaste

National geophysical data grids; gamma-ray, gravity, magnetic, and topographic data for the conterminous United States [New Window]

Gridded geophysical data in a variety of formats.

1998 Assessment of undiscovered deposits of gold, silver, copper, lead, and zinc in the United States [New Window]

Estimates of the tonnages and amounts of contained metal in undiscovered deposits, mineral deposit types.

Bedrock and soil geochemistry from Voyageurs National Park, Minnesota [New Window]

Analyses to establish the background and baseline geochemistry for bedrock and soil in the region, and to determine terrestrial mercury sources and sinks in the park

Selected geochemical data for modeling near-surface processes in mineral systems [New Window]

Data on a variety of mineral deposit types that have variable environmental effects when exposed at the ground surface by mining or natural processes.

A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994 [New Window]

A collection of references of geophysical computer programs, databases, and maps from the USGS

Major- and trace-element concentrations in soils from two continental-scale transects of the United States and Canada [New Window]

Spreadsheets containing geochemical data for soils

Aeromagnetic and aeroradiometric data for the conterminous United States and Alaska from the National Uranium Resource Evaluation (NURE) program of the U.S. Department of Energy [New Window]

Aeroradiometric and aeromagnetic flight-line data from surveys flown at 400 feet with line spacing from 3 to 6 miles from 1974 through 1981.

Historical Files from Federal Government Mineral Exploration-Assistance Programs, 1950 to 1974 [New Window]

Scanned documents describing applications for Federal assistance in exploring for certain strategic and critical minerals, including where the deposits were examined what minerals were found, and whether mining had occurred.

Aeromagnetic survey map of the central California coast ranges [New Window]

Intended to promote further understanding of the geology and structure in the central California Coast Ranges, includes downloadable gridded point database.

Preliminary isostatic residual gravity anomaly map of Paso Robles 30 x 60 minute quadrangle, California [New Window]

Includes 2,604 (170 not previously published) gravity station measurements with calculations of free-air, simple Bouguer, complete Bouguer, and isostatic anomaly.

Review of samples of water, sediment, tailings, and biota at the Little Bonanza mercury mine, San Luis Obispo County, California [New Window]

Data from field sampling of mine tailings, wasterock, sediment, water, and biota at the mine in 2010. Results permit a preliminary assessment of the mining sources of Hg and associated chemicals that could produce elevated levels of monomethylmercury.

Magnetic map of the Irish Hills and surrounding areas, San Luis Obispo County, central California [New Window]

Database includes new helicopter aeromagnetic data, point locations of the local maximum horizontal gradient derived from the aeromagnetic data, and physical property data.

Seven aeromagnetic surveys in California and Nevada [New Window]

Grid and flight-line data files provided by the geophysical survey contractors.

Six aeromagnetic surveys in Nevada and California [New Window]

Gridded data for aeromagnetic surveys with contractors' reports describing the data collection

Isostatic gravity map of the Monterey 30'x60' quadrangle and adjacent areas, California [New Window]

Gravity measurements to support regional mapping and hydrologic studies

Isostatic gravity map of the Point Sur 30 x 60 quadrangle and adjacent areas, California [New Window]

Includes 802 gravity station measurements with isostatic, free-air, simple and complete Bouguer anomalies, and terrain correction.

Cretaceous magmatic rocks of Alaska [New Window]

Data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier, published (at 1:2,500,000 scale) in volume G-1 of "The Geology of Alaska" (GSA)

Geologic map of Alaska [New Window]

Data derived from the 1980 Geologic Map of Alaska compiled by H.M. Beikman and published by the USGS. The map is a regional summary of geologic formations and units at 1:2,500,000 scale. Does not include faults, volcanoes, or correlation chart.

Sedimentary basins of Alaska [New Window]

Data derived from the 1994 "Map showing Sedimentary Basins in Alaska" by C.E. Kirschner. This map is Plate 7 in Volume G-1: "The Geology of Alaska", published by GSA.

Generalized thermal maturity map of Alaska [New Window]

Data derived from the 1996 "Generalized Thermal Maturity Map of Alaska" compiled by M.J. Johnsson and D.G. Howell, published in USGS Bulletin 2142. Combines vitrinite reflectance and conodont alteration index in generalized units.

Alaska digital aeromagnetic database description [New Window]

Basic aeromagnetic data and other airborne survey information for any region of Alaska. Flight-line point information, not grids.

Merged aeroradiometric data for Alaska [New Window]

Gridded data from aeroradiometric surveys of Alaska.

Composite and merged aeromagnetic data for Alaska [New Window]

Whole Rock Geochemical Data For Paleozoic Sedimentary Rocks of the Western Brooks Range, Alaska [New Window]

This report presents geochemical analyses for 210 unaltered and unmineralized rock samples of Paleozoic age in the western Brooks Range of northern Alaska.

Whole Rock Geochemical Data For Altered And Mineralized Rocks, Red Dog Zn-Pb-Ag District, Western Brooks Range, Alaska [New Window]

This report presents geochemical analyses for 220 mostly altered and mineralized rock samples from the Red Dog Zn-Pb-Ag district in the western Brooks Range of northern Alaska.

Aerial gamma-ray surveys in Alaska [New Window]

Measurements indicating abundance of radioactive elements in near-surface rocks. Grids and flight-line data from surveys flown 1976-1980.

Alaska aeromagnetic compilation; digital grids and survey data [New Window]

Surficial geologic map of the Castle Mountain fault between Houston and Hatcher Pass Road, Alaska [New Window]

A surficial geologic map showing the location of the Castle Mountain fault and other active or potentially active faults in the Matanuska-Susitna borough.

Geologic map of the Christian quadrangle, Alaska [New Window]

Geology of the Christian quadrangle in the Porcupine Plateau, southern Brooks Range, and Yukon Flats. Includes geologic map, fossil data, location of oil shale, and geospatial data sets.

GIS coverages of the Castle Mountain fault, south central Alaska [New Window]

The Castle Mountain fault is a major east-northeast striking fault in southern Alaska with historic seismicity and Holocene surface faulting. This data set is a compilation of fault segments from several publications.

Surficial geologic map of the Bettles quadrangle, Alaska [New Window]

The Bettles quadrangle includes part of the southern Brooks Range and uplands and valleys of interior Alaska. This map depicts the surficial geology and glacial history, and includes description of map units and a correlation of map units.

Surficial geologic map of the Hughes quadrangle, Alaska [New Window]

A 1:250,000 scale surficial geologic map of the Hughes quadrangle, Alaska, which extends into the southern Brooks Range and the uplands and valleys of interior Alaska. The map includes glacial history, geologic unit descriptions, and a correlation of map

Surficial geologic map of parts of the Misheguk Mountain and Baird Mountains quadrangles, Noatak National Preserve, Alaska [New Window]

Surficial geologic map of part of the Noatak River drainage system in the western Brooks Range, Alaska. Primary surficial units are late Quaternary glacial, glacio-lacustrine, and fluvial deposits. Map and report include radiocarbon dates, geologic unit

Preliminary geologic map of the northeast Dillingham quadrangle (D-1, D-2, C-1, and C-2), Alaska [New Window]

Map, report, and geospatial data on the geology of the northeastern part of the 1:250,000 scale Dillingham quadrangle, Alaska. Includes Ar40/39 radiometric ages, geologic unit descriptions, and correlation of map units.

Geologic and fossil locality maps of the west-central part of the Howard Pass quadrangle and part of the adjacent Misheguk Mountain quadrangle, western Brooks Range, Alaska [New Window]

This publication includes a bedrock geologic map depicting the complex allochthonous structure of an area along the north flank of the west-central Brooks Range. A compilation of new and previously reported macro- and micro-fossil identifications and a

Engineering geologic maps of northern Alaska, Harrison Bay quadrangle [New Window]

Map and report on the surficial deposits and bedrock of the onshore part of the Harrison Bay quadrangle, Alaska. The map area is located within the Arctic Coastal Plain and in the northeastern part of the National Petroleum Reserve of Alaska (NPRA).

Geologic map of the Ikpikpuk River quadrangle, Alaska [New Window]

Geologic map of the Ikpikpuk quadrangle, compiled from previously published and unpublished sources. This map is part of a collection of digital maps of northern Alaska, that span the transition from the Brooks Range to the Arctic coastal plain.

Geologic map of the Umiat quadrangle, Alaska [New Window]

Geologic map of the Umiat quadrangle, compiled from previously published and unpublished sources. This map is part of a collection of digital maps of northern Alaska, that span the transition from the Brooks Range to the Arctic coastal plain.

Geologic map of the Lookout Ridge quadrangle, Alaska [New Window]

Geologic map of the Lookout Ridge quadrangle, compiled from previously published and unpublished sources. This map is part of a collection of digital maps of northern Alaska, that span the transition from the Brooks Range to the Arctic coastal plain.

Geologic map of the Utukok River quadrangle, Alaska [New Window]

Geologic map of the Utukok River quadrangle, compiled from previously published and unpublished sources. This map is part of a collection of digital maps of northern Alaska, that span the transition from the Brooks Range to the Arctic coastal plain.

Geologic map of the Point Lay quadrangle, Alaska [New Window]

Geologic map of the Point Lay quadrangle, compiled from previously published and unpublished sources. This map is part of a collection of digital maps of northern Alaska, that span the transition from the Brooks Range to the Arctic coastal plain.

Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map of the Yukon-Koyukuk Basin, Alaska [New Window]

Reconnaissance geologic map of the Yukon-Koyukuk basin, Alaska, which is a region characterized by isolated hilly areas and low mountain ranges, separated by broad alluviated interior and coastal lowlands.

Geologic map of the Wrangell-Saint Elias National Park and Preserve, Alaska [New Window]

Reconnaissance geologic map of the largest National Park in the US. Map area includes high mountains, active and ancient volcanoes, expansive ice fields, and alpine and tidewater glaciers. Kennecott Mine, a world-class copper deposit is located in the p

Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map of the Kodiak Islands, Alaska [New Window]

The Kodiak Islands are located on the west side of the Gulf of Alaska and one of the largest areas of exposure of the flysch and melange of the Chugach terrane of southern Alaska.

Geologic map of the Big Delta B-1 quadrangle, east-central Alaska [New Window]

Geologic mapping and U-Pb age dating of the Big Delta B-1 quadrangle provides insights into the geology and gold mineralization of the headwater region of the Goodpaster River.

Geologic map of the Big Delta B-2 quadrangle, east-central Alaska [New Window]

Geologic map of the Big Delta B-2 quadrangle, including U-Pb geochronology, correlation chart, and description of map units.

Geological map data [New Window]

Characteristics of bedrock and surficial geologic terranes and structural features at various levels of detail. The information provided here are intended for use in the synoptic study of large areas, and are likely not suitable for detailed study of geog

Alaska geologic map data [New Window]

A GIS database of geologic units and structural features in Alaska, with lithology, age, data structure, and format written and arranged just like the other states.

Compilation of Alaska gravity data and historical reports [New Window]

Gravity measured from 1958-2005, with standard gravity reduction calculations applied to correct for latitude, elevation, topography, and isostasy.

Mesozoic magmatism and base-metal mineralization in the Fortymile mining district, eastern Alaska--Initial results of petrographic, geochemical, and isotopic studies in the Mount Veta area [New Window]

Initial results of a petrographic, geochemical, and isotopic study of Mesozoic intrusive rocks and spatially associated Zn-Pb-Ag-Cu-Au prospects in the area.

Geochemical and Sulfur-Isotopic Signatures of Volcanogenic Massive Sulfide Deposits on Prince of Wales Island and Vicinity, Southeastern Alaska [New Window]

Alaska Geochemical Database (AGDB)-Geochemical data for rock, sediment, soil, mineral, and concentrate sample media [New Window]

Geochemical analyses of rocks, mineral separates, bulk samples from lake and stream sediments, heavy mineral concentrates, and soils collected by USGS from 1962 to 2009.

Podiform chromite deposits--database and grade and tonnage models [New Window]

Location and characteristics of 1,124 individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements.

Preliminary integrated geologic map databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Data base for undiscovered deposits of base and precious metals [New Window]

Probabilistic estimates of the amounts of undiscovered gold, silver, copper, lead, and zinc in conventional types of mineral deposits in the United States.

Digital Aeromagnetic Datasets for the Conterminous United States and Hawaii - A Companion to the North American Magnetic Anomaly Map [New Window]

Digital and analog archives comprising more than 1,000 surveys, covering approximately 8,000,000 line-km of data, flown at various flight heights and line spacings

Pan-American Center for Earth and Environmental Studies (PACES) gravity data portal [New Window]

Digitized Aeromagnetic Datasets for the Conterminous United States, Hawaii, and Puerto Rico [New Window]

Aeromagnetic anomaly values digitized from older surveys

Precambrian basement structure map of the continental United States-an interpretation of geologic and aeromagnetic data [New Window]

Principal basement structures formed during the Precambrian in the continental United States based on interpretation of regional aeromagnetic anomaly data of North America.

Alabama geologic map data [New Window]

A GIS database of geologic units and structural features in Alabama, with lithology, age, data structure, and format written and arranged just like the other states.

Mapping the mineral resource base for mineral carbon-dioxide sequestration in the conterminous United States [New Window]

Map includes GIS data for magnesium-rich ultramafic rocks

A preliminary full spectrum magnetic anomaly grid of the United States with improved long wavelengths for studying continental dynamics [New Window]

The long-wavelength (50-2,500 km) content of the regional magnetic anomaly compilation was improved by utilizing a nearly homogeneous a nearly homogeneous set of NURE magnetic surveys flown from 1975 to 1981

Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the eastern United States [New Window]

Currently (2011) asbestos is not mined commercially in the US. This shows where it has been found or mined in the past.

Mining claim activity on Federal lands in the contiguous US and Alaska [New Window]

Number and type of mine claims located on Federal lands and registered with the Bureau of Land Management, by year from 1976 through 2007.

Preliminary integrated geologic map databases for the United States: California, Nevada, Arizona, Washington, Oregon, Idaho, and Utah [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Arizona aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Arizona, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Geophysical terranes of the Great Basin and parts of surrounding provinces [New Window]

A set of geophysical maps with anomalies that are labeled and keyed to tables containing information on each anomaly and its source.

Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the southwestern United States (Arizona, Nevada, and Utah) [New Window]

Map and data tables show location, mineralogy, geology, and relevant literature for each mine, prospect, or occurrence

Arizona geologic map data [New Window]

A GIS database of geologic units and structural features in Arizona, with lithology, age, data structure, and format written and arranged just like the other states.

Preliminary integrated geologic map databases for the United States: Montana, Wyoming, Colorado, New Mexico, Kansas, Oklahoma, Texas, Missouri, Arkansas, and Louisiana [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Colorado aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Colorado, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Colorado geologic map data [New Window]

A GIS database of geologic units and structural features in Colorado, with lithology, age, data structure, and format written and arranged just like the other states.

Climax-type porphyry molybdenum deposits [New Window]

Descriptive mineral deposit model, with locations of known deposits of this type and a few site characteristics.

Geochemical data for Colorado soils-Results from the 2006 state-scale geochemical survey [New Window]

Major and trace element concentration data for 960 sites, providing a baseline for the natural variation in soil geochemistry in Colorado.

Central Colorado Assessment Project (CCAP)-Geochemical data for rock, sediment, soil, and concentrate sample media [New Window]

Chemical analysis of 47,478 samples of various geological materials to facilitate geologic mapping, petrologic studies, mineral resource assessment, and similar regional environmental assessements.

Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the Rocky Mountain states of the United States (Colorado, Idaho, Montana, New Mexico, and Wyoming) [New Window]

Currently (2011) asbestos is not mined commercially in the US. This data set shows occurrences and historic mines.

Photographs of historical mining operations in Colorado and Utah [New Window]

A collection of photographs of mine sites, mining operations, and tailings taken prior to 1980 at a variety of sites throughout Colorado and Utah.

Preliminary aeromagnetic anomaly map of California [New Window]

Map showing magnetic anomaly of California composed by merging and editing data from 123 distinct surveys conducted previously.

California geologic map data [New Window]

A GIS database of geologic units and structural features in California, with lithology, age, data structure, and format written and arranged just like the other states.

Geochemical database for igneous rocks of the ancestral Cascades Arc--southern segment, California and Nevada [New Window]

Compilation of all available chemical data (more than 2,000 samples) for igneous rocks that constitute the southern segment of the ancestral Cascades magmatic arc.

Digital map of major bedrock lithologic units for the Pacific Northwest: a contribution to the Interior Columbia Basin Ecosystem Management Project [New Window]

Reported historic asbestos mines, historic asbestos prospects, and other natural occurrences of asbestos in California [New Window]

Currently (2011) asbestos is not mined commercially in the US. This data set shows occurrences and historic mines, and includes information on talc deposits.

Pb-concentrations and Pb-isotope ratios in soils collected along an east-west transect across the United States [New Window]

Analytical results for Pb-concentrations and isotopic ratios from about 150 samples of soil A horizon and about 145 samples of soil C horizon collected along a 4000-km east-west transect across the USA.

Aeromagnetic map for the state of Idaho [New Window]

Aeromagnetic surveys of Idaho, merged to form seamless grids across the state. Data provided in a variety of formats.

Guide to geophysical data for the northern Rocky Mountains and adjacent areas, Idaho, Montana, Washington, Oregon, and Wyoming [New Window]

Mathematical analysis of gravity and aeromagnetic data, with basic and derived grids and vector data and maps.

Idaho geologic map data [New Window]

A GIS database of geologic units and structural features in Idaho, with lithology, age, data structure, and format written and arranged just like the other states.

A compilation of spatial digital databases for selected U.S. Geological Survey nonfuel mineral resource assessments for parts of Idaho and Montana [New Window]

Montana aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Montana, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Precambrian basement geologic map of Montana--An interpretation of aeromagnetic anomalies [New Window]

Geologic map showing the structure and history of the basement rocks of Montana. Most of the state is covered by Phanerozoic bedrock units; the underlying basement structure must be inferred from magnetic anomaly data combined with geologic observations.

Montana geologic map data [New Window]

A GIS database of geologic units and structural features in Montana, with lithology, age, data structure, and format written and arranged just like the other states.

Nebraska, Kansas, and Oklahoma aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Nebraska, Kansas, and Oklahoma, merged to form seamless grids across the states. Gravity anomaly data are provided as well.

Nebraska geologic map data [New Window]

A GIS database of geologic units and structural features in Nebraska, with lithology, age, data structure, and format written and arranged just like the other states.

Precambrian basement of the north Mid-Continent U.S.A.: a digital representation of the 1990 P.K. Sims map [New Window]

Geologic units, structural features, drill hole locations, and structure contours

Reported historic asbestos prospects and natural asbestos occurrences in the central United States [New Window]

Currently (2011) asbestos is not mined commercially in the US. This data set describes historical mines and occurrences.

Nevada magnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Nevada, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.

Gravity map of Nevada [New Window]

Gravity observations throughout Nevada combined to provide a consistent collection of point measurements and generate maps.

Nevada geologic map data [New Window]

A GIS database of geologic units and structural features in Nevada, with lithology, age, data structure, and format written and arranged just like the other states.

Complete analytical data for Jurassic igneous rocks in the Bald Mountain mining district, Nevada [New Window]

Petrographic and geochemical analyses of 50 outcrop samples and 58 drill core samples.

Analytical Results and Sample Locations of Reanalyzed NURE Stream-Sediment and Soil Samples for the Humboldt River Basin Mineral-Environmental Assessment, Northern Nevada [New Window]

The U.S. Geological Survey (USGS) and the Bureau of Land Management (BLM) collected stream-sediment and soil samples in order to evaluate the geochemistry of the Humboldt River Basin.

Comparative geology and geochemistry of sedimentary- rock-hosted (Carlin-type) gold deposits in the People's Republic of China and in Nevada, USA (Revised version) [New Window]

This small database provides information about sedimentary- rock-hosted (Carlin-type) gold deposits in China.

New Mexico aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of New Mexico, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

New Mexico geologic map data [New Window]

A GIS database of geologic units and structural features in New Mexico, with lithology, age, data structure, and format written and arranged just like the other states.

Dataset of Aggregate Producers in New Mexico [New Window]

Location and descriptive data for aggregate producers in New Mexico that are believed to have been active during the period 1997-1999.

Oregon magnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Oregon, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Oregon geologic map data [New Window]

A GIS database of geologic units and structural features in Oregon, with lithology, age, data structure, and format written and arranged just like the other states.

Reported Historic Asbestos Mines, Historic Asbestos Prospects, and Other Natural Occurrences of Asbestos in Oregon and Washington [New Window]

Location, mineralogy, host rocks, and references for 51 natural occurrences of asbestos in Washington and Oregon, using descriptions found in the geologic literature.

South Dakota aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of South Dakota, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Principal facts for gravity data collected in South Dakota [New Window]

Gravity anomaly measurements throughout the state

South Dakota geologic map data [New Window]

A GIS database of geologic units and structural features in South Dakota, with lithology, age, data structure, and format written and arranged just like the other states.

Utah aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Utah, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Utah geologic map data [New Window]

A GIS database of geologic units and structural features in Utah, with lithology, age, data structure, and format written and arranged just like the other states.

Comparison of ASTER- and AVIRIS-derived mineral and vegetation maps of the White Horse replacement alunite deposit and surrounding area, Marysvale volcanic field, Utah [New Window]

Analysis of mineral and vegetation maps of parts of the Marysvale volcanic field in west-central Utah near the White Horse replacement alunite deposit.

Washington aeromagnetic maps and data: [New Window]

Aeromagnetic surveys of Washington state, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Washington geologic map data [New Window]

A GIS database of geologic units and structural features in Washington, with lithology, age, data structure, and format written and arranged just like the other states.

Low-fluorine stockwork molybdenite deposits [New Window]

Descriptive mineral deposit model, with locations of known deposits of this type and a few site characteristics.

Wyoming aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Wyoming, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Wyoming geologic map data [New Window]

A GIS database of geologic units and structural features in Wyoming, with lithology, age, data structure, and format written and arranged just like the other states.

Databases and simplified geology for mineralized areas, claims, mines, and prospects in Wyoming. [New Window]

This data release contains mineral resource and geology data for metallic and nonmetallic mineral sites in Wyoming. Data is provided in both spreadsheet format (Microsoft Excel) and in GIS ArcView and MapInfo. Text available in PDF format.

Aeromagnetic surveying in Wisconsin 1977-98 [New Window]

Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' x 60' quadrangles, Wisconsin and Michigan [New Window]

Geologic units and structural features, GIS data files

Gravity and magnetic data in the vicinity of Virgin Valley, southern Nevada [New Window]

Field measurements: 548 gravity and 6484 magnetic anomaly locations, data in fixed-format text files.

Candidate-penetrative-fracture mapping of the Grand Canyon area, Arizona, from spatial correlation of deep geophysical features and surficial lineaments [New Window]

Includes a wide variety of geological and geophysical data: geologic, aeromagnetic, and gravity maps with SLAR, DEM, TM, and NDVI imagery.

Principal facts for gravity stations and physical property measurements in the Lake Mead 30'x60' quadrangle, Nevada and Arizona [New Window]

Gravity data were collected in support of geologic mapping of the quadrangle. In addition, older gravity data were reprocessed for consistency and included, as well as 250 measurements of density and magnetic susceptibility.

Virginia aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Virginia, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.

Preliminary integrated geologic map databases for the United States: Delaware, Maryland, New York, Pennsylvania, and Virginia [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Virginia geologic map data [New Window]

A GIS database of geologic units and structural features in Virginia, with lithology, age, data structure, and format written and arranged just like the other states.

Geologic map of central (interior) Alaska [New Window]

Geologic map and associated digital databases of central Alaska. Compilation and reinterpretation of previously published and unpublished mapping at 1:250,000 scale, with limited 1:125,000 and 1:63,360 scale mapping.

Principal facts for 408 gravity stations in the vicinity of the Talkeetna Mountains, south-central Alaska [New Window]

Data collected as part of a geological and geophysical framework study

Stream-sediment samples reanalyzed for major, rare earth, and trace elements from ten 1:250,000-scale quadrangles, south-central Alaska, 2007-08 [New Window]

New data for 366 previously collected stream-sediment samples, because recently developed analytical methods can detect additional elements of interest and have lower detection limits than the methods used when these samples were originally analyzed.

Stream-sediment samples reanalyzed for major, rare earth, and trace elements from seven 1:250,000-scale quadrangles, south-central Alaska, 2007-09 [New Window]

New analyses of 1,075 previously collected stream sediment samples, measuring more elements with better precision. Includes arsenic, gold, palladium, and platinum and 55 major, rare earth, and trace element concentrations.

Preliminary integrated geologic map databases for the United States: Digital data for the generalized bedrock geologic map, Yukon Flats region, east-central Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Density and magnetic susceptibility values for rocks in the Talkeetna mountains and adjacent region, south-central Alaska [New Window]

A compilation and statistical analysis of 306 density and 706 magnetic susceptibility measurements of rocks from south-central Alaska

Preliminary integrated geologic map databases for the United States: Digital data for the geology of Wrangell-Saint Elias National Park and Preserve, Alaska [New Window]

GIS dataset for 'Geologic map of the Wrangell-Saint Elias National Park and Preserve, Alaska' USGS SIM 2877. The map area includes high mountains, active and ancient volcanoes, expansive ice fields, and alpine and tidewater glaciers.

Aeromagnetic surveys in the Anchorage, Iliamna, and Tyonek quadrangles, Alaska [New Window]

Gridded data from aeromagnetic surveys

Preliminary Geologic Map of the Cook Inlet Region, Alaska-- Including parts of the Talkeetna, Talkeetna Mountains, Tyonek, Anchorage, Lake Clark, Kenai, Seward, Iliamna, Seldovia, Mount Katmai, and Afognak 1:250,000-scale quadrangles [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Integrated investigations of environmental effects of historical mining in the Basin and Boulder mining districts, Boulder River watershed, Jefferson County, Montana [New Window]

Geological, geochemical, hydrologic, and biological observations combined with geographic framework data, supporting a multidisciplinary assessment of the impact of historic mining in this area.

Spatial databases for the geology of the Northern Rocky Mountains - Idaho, Montana, and Washington [New Window]

The spatial databases represent the original content of 43 published geologic maps, provide normalized map unit descriptions, and provide additional information and interpretation not in the original reports.

Ground geophysical study of the Buckeye Mine Tailings, Boulder watershed, Montana [New Window]

Electromagnetic, resistivity, and magnetic surveys used to determine the extent of contamination in an abandoned mine area.

Schlumberger DC resistivity soundings in the Boulder watershed, Jefferson and Lewis and Clark counties, Montana [New Window]

DC resistivity soundings were made to map subsurface lithologic, structural and hydrologic features important in controlling possible ground water contamination from mining activities and for design of remediation efforts.

Relational database for the geology of the northern Rocky Mountains; Idaho, Montana, and Washington [New Window]

Geologic map unit and lithologic descriptions used in Open File Report 2005-1235, with extensive bibliographic references to geologic literature that could not be included in the spatial database.

Geochemical database for the Boulder Batholith and its satellitic plutons, southwest Montana [New Window]

Geochemical analyses of Cretaceous igneous intrusions in order to establish the geologic framework for world-class mineral deposits of the Butte district

Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map of the lower Yukon River region, Alaska [New Window]

Reconnaissance geologic map of the lower Yukon River region in southwest Alaska includes Quaternary surficial deposits on the delta plain and bedrock exposures in mountains within the delta plain and the uplands that border the delta plain.

Alaska resource data file: Arctic quadrangle [New Window]

Descriptions of mines, prospects, and mineral occurrences in the Arctic quadrangle, Alaska

Alaska resource data file: Adak quadrangle [New Window]

Descriptions of mines, prospects, and mineral occurrences in the Adak quadrangle, Alaska

Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map of the western Aleutian Islands, Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Geochemical analysis of soils and sediments, Coeur d'Alene drainage basin, Idaho: Sampling, analytical methods, and results [New Window]

Chemical composition of sediments and soils are of interest because of the potential for human and wildlife health impacts from high metal contents due to over 100 years of mining activity.

Digital geologic map of the Rosalia 1:100,000 quadrangle, Washington and Idaho: A digital database for the 1990 S.Z. Waggoner map [New Window]

Geoloic units and structural features

Potential mineral resources, Payette National Forest, Idaho; description and probabilistic estimation [New Window]

Permissive tracts for a variety of types of mineral deposits, with information about deposits that have already been mined.

Uranium-lead zircon ages and Sr, Nd, and Pb isotope geochemistry of selected plutonic rocks from western Idaho [New Window]

U-Pb geochronology and isotopic studies of select plutons across the Salmon River suture in western Idaho.

Spatial database of mining-related features in 2001 at selected phosphate mines, Bannock, Bear Lake, Bingham, and Caribou Counties, Idaho [New Window]

Features include mine pit; backfilled mine pit; waste rock dump; adit and waste rock dump; ore stockpile; topsoil stockpile; tailings or tailings pond; sediment catchment; facilities; road; railroad; water reservoir; disturbed land, undifferentiated; and

Digital database of mining-related features at selected historic and active phosphate mines, Bannock, Bear Lake, Bingham, and Caribou Counties, Idaho [New Window]

Spatial database that delineates mining-related features in areas of historic and active phosphate mining.

Chemical Composition of Samples Collected from Waste Rock Dumps and Other Mining-Related Features at Selected Phosphate Mines in Southeastern Idaho, Western Wyoming, and Northern Utah [New Window]

Chemical analyses for 31 samples collected from various phosphate mine sites in southeastern Idaho (25), northern Utah (2), and western Wyoming (4)

Stratabound copper-silver deposits of the Mesoproterozoic Revett Formation, Montana and Idaho with a section on databases and spatial-data files for the geology and mineral deposits of the Revett Formation [New Window]

Includes deposits, occurrences, and prospects; drill core logs and measured sections; and spatial databases for geologic maps, untested exploration areas, and permissive tracts for undiscovered mineral deposits.

Particle size characterization of water-elutriated Libby amphibole 2000 and RTI International amosite [New Window]

Morphological data on fibrous mineral particles from an old vermiculite mine that has been a subject of environmental health investigations

Examination of Libby, Montana, Fill Material for Background Levels of Amphibole from the Rainy Creek Complex Using Scanning Electron Microscopy and X-Ray Microanalysis [New Window]

Sample locations and descriptions, with compositional analysis to constrain the natural background levels of fibrous amphiboles potentially derived from the nearby Rainy Creek Complex.

Digital map of surficial geology, wetlands, and deepwater habitats, Coeur d'Alene river valley, Idaho [New Window]

Details of materials and geologic environments in an area where a long history of mining has enriched stream sediments in silver, lead, zinc, arsenic, antimony and mercury, copper, cadmium, manganese, and iron.

Lead-rich sediments, Coeur d'Alene River valley, Idaho; Area, volume, tonnage, and lead content: Surface-sediment geochemical data [New Window]

Tables containing locations and lead concentrations of 998 surface-sediment geochemical sample sites

Spatial digital database for the tectonic map of southeast Arizona [New Window]

Geologic map GIS which represents the original content of the published geologic map and which can be queried in many ways to produce a variety of geologic maps and derivative products.

An interpretation of the 1996 aeromagnetic data for the Santa Cruz basin, Tumacacori Mountains, Santa Rita Mountains, and Patagonia Mountains, South-Central Arizona [New Window]

Measurements of in-situ magnetic properties of several map units to determined whether or not mapped lithologies were responsible for aeromagnetic anomalies observed in a previous high-resolution survey (data of Sweeney, 2000).

Spatial Digital Database of the Geologic Map of Catalina Core Complex and San Pedro Trough, Pima, Pinal, Gila, Graham, and Cochise Counties, Arizona [New Window]

Geologic map information in GIS formats

An interpretation of the 1997 airborne electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona [New Window]

Grids and flight-line magnetic and conductivity data

Gravity data from the San Pedro River Basin, Cochise County, Arizona [New Window]

321 observed gravity values with free-air, simple Bouguer, and complete Bouguer anomaly values; high-precision relative-gravity surveys repeated over time, useful for aquifer-storage-change monitoring; and absolute gravity values for use as base stations.

South Carolina aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of South Carolina, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.

South Carolina geologic map data [New Window]

A GIS database of geologic units and structural features in South Carolina, with lithology, age, data structure, and format written and arranged just like the other states.

Preliminary Digital Geologic Map of the Appalachian Piedmont and Blue Ridge, South Carolina Segment [New Window]

Aerial gamma-ray, Landsat TM, and digital elevation data, Big Bend area, Texas [New Window]

This report presents the results of analyses and interpretation of aerial gamma-ray, Landsat TM, geologic, and digital elevation data of the Big Bend area in Texas.

Quality of water and sediment in streams affected by historical mining, and quality of mine tailings, in the Rio Grande/Río Bravo basin, Big Bend area of the United States and Mexico, August 2002 [New Window]

Geochemical data for stream water, sediments, and mine tailings in this area

Geologic map of Big Bend National Park, Texas [New Window]

New geologic map to reflect mapping of late Cretaceous to Tertiary clastic sedimentary rocks, park-wide mapping of surficial deposits, and a newly revised volcanic stratigraphy.

Aerial gamma-ray survey for parts of Cameron, Hidalgo, and Willacy Counties, Texas [New Window]

The USGS had an aerial survey flown over parts of Cameron, Hidalgo, and Willacy Counties in Texas. The aerial survey included measurements of the earth's magnetic field and of the radioactivity of the surface rocks and soils.

Radon in soils of parts of Cameron, Hidalgo, and Willacy Counties, Texas [New Window]

Analysis of soil samples in the Texas borderland area

Chemistry of stream sediments and surface waters in New England [New Window]

Regional data for pH, alkalinity, and specific conductance for stream waters and a multi-element geochemical dataset for stream sediments collected in the New England.

Sequential extraction results and mineralogy of mine waste and stream sediments associated with metal mines in Vermont, Maine, and New Zealand [New Window]

Results from sequential extraction experiments and the quantitative mineralogy for samples of stream sediments and mine wastes collected from metal mines.

Geochemical characterization of mine waste at the Ely Copper Mine superfund site, Orange County, Vermont [New Window]

An environmental impact study is done for the abandoned Ely copper mine. The extent of contamination is studyed along with the type and chemical composition of the mine waste piles.

Geochemical Characterization of Mine Waste, Mine Drainage, and Stream Sediments at the Pike Hill Copper Mine Superfund Site, Orange County, Vermont: U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency [New Window]

Sampling procedures, analytical methodologies, and results to assess the potential for mine waste and drainage to have an adverse impact on aquatic ecosystems, on drinking- water supplies, and to human health

Surface-water hydrology and quality at the Pike Hill Superfund Site, Corinth, Vermont, October 2004 to December 2005 [New Window]

Synoptic water-quality and benthic macroinvertebrate sampling at 14 stream sites to characterize the quality of surface water in the watershed on a seasonal and spatial basis, as well as to assess the effects of wetlands on water quality.

Aquatic assessment of the Ely Copper Mine Superfund site, Vershire, Vermont [New Window]

A wide variety of geochemical analyses show strong local impact on water quality in this area of historical copper mining.

New England states aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of New England, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.

Preliminary integrated geologic map databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island and Vermont [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Vermont geologic map data [New Window]

A GIS database of geologic units and structural features in Vermont, with lithology, age, data structure, and format written and arranged just like the other states.

Provisional zircon and monazite uranium-lead geochronology for selected rocks from Vermont [New Window]

Results of zircon and monazite U-Pb geochronologic analyses of 24 rock samples collected from mapped exposures identified while conducting new, detailed (1:24,000-scale) geologic or reconnaissance geologic mapping for the new state map of Vermont.

Relation of arsenic, iron, and manganese in ground water to aquifer type, bedrock lithogeochemistry, and land use in the New England coastal basins [New Window]

Geochemical data for groundwater from a variety of geologic settings.

Rhode Island geologic map data [New Window]

A GIS database of geologic units and structural features in Rhode Island, with lithology, age, data structure, and format written and arranged just like the other states.

Lithogeochemical character of near-surface bedrock in the New England coastal basins [New Window]

Re-classification of geologic units according to their geochemical properties

Connecticut geologic map data [New Window]

A GIS database of geologic units and structural features in Connecticut, with lithology, age, data structure, and format written and arranged just like the other states.

Massachusetts geologic map data [New Window]

A GIS database of geologic units and structural features in Massachusetts, with lithology, age, data structure, and format written and arranged just like the other states.

New Hampshire geologic map data [New Window]

A GIS database of geologic units and structural features in New Hampshire, with lithology, age, data structure, and format written and arranged just like the other states.

Bedrock geologic map of New Hampshire, a digital representation of Lyons and others 1997 map and ancillary files [New Window]

Bedrock geology with geopolitical and hydrologic information, such as political boundaries, quadrangle boundaries, hydrologic units, and water-well data

Isostatic gravity map of the Las Vegas 30'x60' quadrangle, California and Nevada [New Window]

Includes principal facts (gravity observations) for 2,506 stations.

Geologic and geophysical maps of the Death Valley ground-water model area, Nevada and California [New Window]

Maps and geospatial data for (a) geology; (b) tectonics; (c) isostatic gravity anomaly; (d) aeromagnetic anomaly; (e) depth to pre-Cenozoic basement.

Gravity and ground magnetic data from selected traverses in the Amargosa desert and vicinity, Nevada and California [New Window]

Maps of aeromagnetic data and a table of gravity station data now available for download

Ground-magnetic studies of the Amargosa desert region, California and Nevada [New Window]

Hand-held magnetometer and sample magnetic susceptibility measurements used to help interpret complex patterns in the magnetic anomaly of this area.

Aeromagnetic expression of buried basaltic volcanoes near Yucca Mountain, Nevada [New Window]

Mathematical modeling and analysis of aeromagnetic anomaly data (gridded data provide in another report).

Digital geologic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California, revision 4 [New Window]

GIS data for geologic units and structural features, with aeromagnetic and gravity maps in PDF

Aeromagnetic survey of the Amargosa desert, Nevada and California [New Window]

Grid data files along with maps in PDF and PostScript accompany this report

Summary of geophysical investigations of the Death Valley regional water-flow modeling project, Nevada and California [New Window]

Magnetic and gravity anomaly and structure contour data

Review of samples of tailings, soils and stream sediment adjacent to and downstream from the Ruth Mine, Inyo County, California [New Window]

Detailed study of mine waste material and sediments from streams passing through it. Arsenic is the main contaminant of interest here.

Physical, chemical, and mineralogical data from surficial deposits, groundwater levels, and water composition in the area of Franklin Lake playa and Ash Meadows, California and Nevada [New Window]

Presents data and describes the methods used to determine the physical attributes, as well as the chemical and mineralogical composition of surficial deposits; groundwater levels; and water composition in this area.

Bedrock geologic map of the Port Wing, Solon Springs, and parts of the Duluth and Sandstone 30' x 60' quadrangles, Wisconsin [New Window]

This Report provides digital data (shapefiles and .e00 files) for the bedrock geology in the Port Wing, Solon Springs, and parts of the Duluth and Sandstone quadrangles in Wisconsin.

Bedrock geology and mineral resources of the Knoxville 1° x 2° quadrangle, Tennessee, North Carolina, and South Carolina [New Window]

Digital format for the map plate in Bulletin 1979 (Robinson et al., 1991),Bedrock Geology and Mineral Resources of the Knoxville 1°x2° Quadrangle, Tennessee, North Carolina, and South Carolina.

Maine geologic map data [New Window]

A GIS database of geologic units and structural features in Maine, with lithology, age, data structure, and format written and arranged just like the other states.

High-angle faults in the basement of Yucca Flats, Nevada Test Site, Nevada, based on analysis of a constrained gravity inversion surface [New Window]

A fault map and digital fault dataset were constructed based on offsets of the basement surface. Because these faults are, in large part, not present at the surface, they are interpreted to be inactive faults, older than the alluvial basin fill.

Geophysical framework of the southwestern Nevada volcanic field and hydrogeologic implications [New Window]

Report describing detailed interpretation of geophysical survey data to draw inferences about subsurface geologic features and likely consequences for the hydrogeologic system.

A preliminary investigation of the structure of southern Yucca Flat, Massachusetts Mountain, and CP basin, Nevada Test Site, Nevada, based on geophysical modeling [New Window]

Maps showing aeromagnetic survey results, locations of gravity station data, and discussions of processing within the report

Modeling of the Climax Stock and related plutons based on the inversion of magnetic data, southwest Nevada [New Window]

Mathematical modeling, coupled with new observations of magnetic susceptibility, yield better estimates of the underground configuration of granite plutons.

Preliminary gravity inversion model of Frenchman Flat Basin, Nevada Test Site, Nevada [New Window]

Provides data for the depth below the land surface,in meters, of the modeled location of the Pre-Tertiary basement surface.

Case study of the environmental signature of a recently abandoned, carbonate-hosted replacement deposit: The Clayton Mine, Idaho [New Window]

Multi-element geochemical analysis of host rock, ore, mine waste, flotation-mill tailings, slag, stream sediments, creek and adit waters, and leachates of mine waste and mill tailings.

Stream-Sediment Geochemistry in Mining-Impacted Drainages of the Yankee Fork of the Salmon River, Custer County, Idaho [New Window]

Analysis of stream sediments to assess the geochemistry, in particular the mercury and selenium contents, of mining-impacted sediments in the study area

An aeromagnetic survey in Yellowstone National Park [New Window]

Grids of total magnetic intensity for the park

Map showing areas with potential for talc deposits in the Gravelly, Greenhorn, and Ruby ranges and the Henrys Lake Mountains of southwestern Montana [New Window]

Geologic data supporting mineral resource assessment

Map showing areas with potential for garnet resources in bedrock and placer in the Blacktail Mountains and the Gravelly, Greenhorn, Ruby, and Snowcrest ranges of southwestern Montana [New Window]

Geological data in support of mineral resource assessment

Chromite deposits in central part of the Stillwater Complex, Sweet Grass County, Montana: A digital database for the geologic map of the east slope of Iron Mountain [New Window]

Geologic map digitized from a paper copy of plate 10 from USGS Bulletin 1015-D (Howland, 1955)

Multielement geochemical dataset of surficial materials for the northern Great Basin [New Window]

Geochemical data generated during mineral and environmental assessments for the Bureau of Land Management in northern Nevada, northeastern California, southeastern Oregon, and southwestern Idaho.

Geologic datasets for weights of evidence analysis in northeast Washington--4. Mineral industry activity in Washington, 1985-1997. [New Window]

Tabular presentation of mineral activities for mining and exploration in Washington during 1985 to 1997.

Digital geologic map of Spokane County and vicinity, Washington and Idaho [New Window]

Geologic data for Spokane County for use in future spatial analysis by a variety of users. These data will better enable Spokane County agencies to predict the likely occurrence of additional mineral lands, primarily containing sand, gravel, rock and clay

Determination of premining geochemical background and delineation of extent of sediment contamination in Blue Creek downstream from Midnite Mine, Stevens county, Washington [New Window]

Geochemical and radionuclide analyses of surface samples and cores taken near the outflow of this old uranium mine.

A dataset of magnetic susceptibility, metalization, and alteration for samples from the Stinkingwater mining district, Absaroka Mountains, Wyoming [New Window]

Magnetic susceptibility measured for 700 samples of drill core from thirteen drill holes in the porphyry copper-molybdenum deposit of the Stinkingwater mining district in the Absaroka Mountains, Wyoming

Geophysical surveys of Bear Lake, Utah-Idaho, September, 2002 [New Window]

Detailed bathymetry, lake-floor acoustic imaging, and sample characteristics to infer bottom sediment characteristics.

Six aeromagnetic surveys in California, Nevada, and Arizona [New Window]

Grid and flight-line data files provided to USGS by contract geophysical surveyors

Gravity and magnetic surveys over the Santa Rita fault system, southeastern Arizona [New Window]

Gravity station data and hand-held magnetometer measurements with analysis and description of methodology

Three aeromagnetic surveys in south central Arizona [New Window]

Grids and flight-line data for the surveys of this area

New Jersey aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of New Jersey, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

New Jersey geologic map data [New Window]

A GIS database of geologic units and structural features in New Jersey, with lithology, age, data structure, and format written and arranged just like the other states.

Delaware geologic map data [New Window]

A GIS database of geologic units and structural features in Delaware, with lithology, age, data structure, and format written and arranged just like the other states.

Maryland geologic map data [New Window]

A GIS database of geologic units and structural features in Maryland, with lithology, age, data structure, and format written and arranged just like the other states.

New York geologic map data [New Window]

A GIS database of geologic units and structural features in New York, with lithology, age, data structure, and format written and arranged just like the other states.

Pennsylvania geologic map data [New Window]

A GIS database of geologic units and structural features in Pennsylvania, with lithology, age, data structure, and format written and arranged just like the other states.

Preliminary integrated geologic map databases for the United States: Kentucky, Ohio, Tennessee, and West Virginia [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Kentucky geologic map data [New Window]

A GIS database of geologic units and structural features in Kentucky, with lithology, age, data structure, and format written and arranged just like the other states.

Ohio magnetic anomaly grid at flight altitude of 1000 feet above ground [New Window]

Ohio complete bouguer gravity anomaly grid [New Window]

Illinois, Indiana, and Ohio magnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Illinois, Indiana, and Ohio, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Ohio geologic map data [New Window]

A GIS database of geologic units and structural features in Ohio, with lithology, age, data structure, and format written and arranged just like the other states.

Tennessee geologic map data [New Window]

A GIS database of geologic units and structural features in Tennessee, with lithology, age, data structure, and format written and arranged just like the other states.

Magnetic and gravity anomaly maps of West Virginia [New Window]

Aeromagnetic surveys of West Virginia, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

West Virginia geologic map data [New Window]

A GIS database of geologic units and structural features in West Virginia, with lithology, age, data structure, and format written and arranged just like the other states.

Florida geologic map data [New Window]

A GIS database of geologic units and structural features in Florida, with lithology, age, data structure, and format written and arranged just like the other states.

Georgia aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Georgia, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Georgia geologic map data [New Window]

A GIS database of geologic units and structural features in Georgia, with lithology, age, data structure, and format written and arranged just like the other states.

Mississippi geologic map data [New Window]

A GIS database of geologic units and structural features in Mississippi, with lithology, age, data structure, and format written and arranged just like the other states.

North Carolina geologic map data [New Window]

A GIS database of geologic units and structural features in North Carolina, with lithology, age, data structure, and format written and arranged just like the other states.

Preliminary integrated geologic map databases for the United States; Minnesota, Wisconsin, Michigan, Illinois, and Indiana [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Digital geologic map and mineral deposits of the Lake Superior region- Minnesota, Wisconsin, Michigan [New Window]

Bedrock geologic units, faults, and MRDS mineral deposit records for the area

Minnesota geologic map data [New Window]

A GIS database of geologic units and structural features in Minnesota, with lithology, age, data structure, and format written and arranged just like the other states.

The geochemical landscape of northwestern Wisconsin and adjacent parts of northern Michigan and Minnesota (geochemical data files) [New Window]

Michigan geologic map data [New Window]

A GIS database of geologic units and structural features in Michigan, with lithology, age, data structure, and format written and arranged just like the other states.

Bedrock geologic map of the Ashland and the northern part of the Ironwood 30 min X 60 min quadrangles, Wisconsin and Michigan [New Window]

Preliminary digital geologic map of the Penokean (early Proterozoic) continental margin in northern Michigan and Wisconsin [New Window]

This map portrays the geology of Early Proterozoic rocks deposited along the southern margin of the Archean Superior craton during the Penokean orogenic cycle in northern Michigan and Wisconsin.

Michigan magnetic and gravity maps and data [New Window]

Best available public-domain aeromagnetic and gravity data in the State of Michigan merged into composite grids. Magnetic data compiled from 25 separate magnetic surveys.

Illinois geologic map data [New Window]

A GIS database of geologic units and structural features in Illinois, with lithology, age, data structure, and format written and arranged just like the other states.

Indiana geologic map data [New Window]

A GIS database of geologic units and structural features in Indiana, with lithology, age, data structure, and format written and arranged just like the other states.

Principal facts for gravity data collected in Wisconsin [New Window]

Gravity anomaly surveys of Wisconsin, both separately by survey and combined.

Wisconsin aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Wisconsin, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Wisconsin geologic map data [New Window]

A GIS database of geologic units and structural features in Wisconsin, with lithology, age, data structure, and format written and arranged just like the other states.

Bedrock Geologic Map of the Port Wing, Solon Springs, and Parts of the Duluth and Sandstone 30' X 60' Quadrangles, Wisconsin [New Window]

Aeromagnetic map of part of northwestern Wisconsin and adjacent areas [New Window]

Kansas geologic map data [New Window]

A GIS database of geologic units and structural features in Kansas, with lithology, age, data structure, and format written and arranged just like the other states.

Oklahoma geologic map data [New Window]

A GIS database of geologic units and structural features in Oklahoma, with lithology, age, data structure, and format written and arranged just like the other states.

Texas magnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Texas, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.

Texas geologic map data [New Window]

A GIS database of geologic units and structural features in Texas, with lithology, age, data structure, and format written and arranged just like the other states.

Missouri aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Missouri, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Missouri geologic map data [New Window]

A GIS database of geologic units and structural features in Missouri, with lithology, age, data structure, and format written and arranged just like the other states.

Arkansas and Louisiana aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Arkansas and Louisiana, merged to form seamless grids across the states. Gravity anomaly data are provided as well.

Arkansas geologic map data [New Window]

A GIS database of geologic units and structural features in Arkansas, with lithology, age, data structure, and format written and arranged just like the other states.

Louisiana geologic map data [New Window]

A GIS database of geologic units and structural features in Louisiana, with lithology, age, data structure, and format written and arranged just like the other states.

Preliminary Integrated Geologic Map Databases for the United States: Digital data for the geology of the southern Brooks Range, Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010 [New Window]

Study to estimate the 3-D distribution of permafrost, to evaluate the effectiveness of these methods at mapping permafrost geometry, and to better define the physical properties of the subsurface in discontinuous permafrost areas.

Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance bedrock geologic map for the northern Alaska peninsula area, southwest Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Aeromagnetic survey of Dillingham Area in Southwest Alaska [New Window]

Gridded survey data with summary map images.

Digital data for the geology of the Prince William Sound and Kenai Peninsula region, Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Digital Data for the Reconnaissance Geologic Map for Prince William Sound and the Kenai Peninsula, Alaska [New Window]

Geologic map compiled from existing sources without generalization, with new or revised data where available. Part of a statewide geologic map database effort in which the structure and content of the data is as consistent as is practical.

Geochemical data for samples collected in 2007 near the concealed Pebble porphyry Cu-Au-Mo deposit, southwest Alaska [New Window]

Analytical results for geochemical samples collected in 2007 from the Pebble deposit and surrounding environs

Geochemical data for samples collected in 2008 near the concealed Pebble porphyry Cu-Au-Mo deposit, southwest Alaska [New Window]

Chemical analysis of surface samples taken over a well known but concealed deposit to understand metal migration into the surface materials and to assess the power of surface sampling for detecting concealed deposits of this type.

Aeromagnetic survey of Taylor Mountains area in southwest Alaska [New Window]

Map and flight-line data, with documentation of the survey

Preliminary grid data and maps for an aeromagnetic survey of the Taylor Mountains quadrangle and a portion of the Bethel quadrangle, Alaska [New Window]

Preliminary data (grids and images) and maps for a new aeromagnetic survey

Major- and trace-element concentrations in rock samples collected in 2006 from the Taylor mountains 1:250,000-scale quadrangle, Alaska [New Window]

138 rock geochemistry samples collected during the 2006 field season were analyzed using the ICP-AES/MS42, ICP-AES10, fire assay, and cold vapor atomic absorption methods

Reconnaissance study of the Taylor Mountains pluton, southwestern Alaska [New Window]

Major and trace element geochemistry for 10 rock samples whose locations are not specified, with data from Argon-Argon analysis supporting geochronological data.

Aqueous geochemical data from the analysis of stream-water samples collected in June and July 2006-Taylor Mountains 1:250,00-scale quadrangle, Alaska [New Window]

Analyses of 72 water samples include pH, conductivity, water temperature, major cation and anion concentrations, trace-element concentrations, and dissolved organic-carbon concentrations.

Aqueous geochemical data from the analysis of stream-water samples collected in June and August 2008--Taylor Mountains 1:250,000- and Dillingham D-4 1:63,360-scale quadrangles, Alaska [New Window]

Measurements on 92 samples, including pH, conductivity, water temperature, major cation and anion concentrations, and trace-element concentrations.

Preliminary integrated geologic map databases for the United States: Digital data for the geology of southeast Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Results from the analysis of 723 stream-sediment samples from the Stikine Geophysical Survey area within the Petersburg, Sumdum, Bradfield Canal, and Sitka quadrangles, southeastern Alaska [New Window]

Small regional scale geochemical mineral exploration results from field studies in Duncan Canal, Zarembo Island, and western Etolin Island.

Aeromagnetic, gravity anomaly, and derivative maps of the Craig and Dixon Entrance 1°x3° quadrangles of southeastern Alaska [New Window]

A simplified geologic map, raw gravity and magnetic data, with derivative products including depth-to-source and rock densities, with limited interpretations of the underlying geology, structures, and mineral resources.

Iowa magnetic and gravity maps and data [New Window]

Aeromagnetic surveys of Iowa, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

Iowa geologic map data [New Window]

A GIS database of geologic units and structural features in Iowa, with lithology, age, data structure, and format written and arranged just like the other states.

North Dakota aeromagnetic and gravity maps and data [New Window]

Aeromagnetic surveys of North Dakota, merged to form seamless grids across the state. Gravity anomaly data are provided as well.

North Dakota geologic map data [New Window]

A GIS database of geologic units and structural features in North Dakota, with lithology, age, data structure, and format written and arranged just like the other states.

Principal facts for gravity stations in the Dry Valley area, West-Central Nevada and east-central California [New Window]

Gravity measurements used for determining geologic structure to aid in understanding ground-water flow

Gravity, magnetic, and physical property data in the Smoke Creek Desert area, Northwest Nevada [New Window]

Aerial, truck-towed, and hand-held magnetometer measurements, gravity station data, and sample density and magnetic susceptibility measures

Geophysical investigations of the Smoke Creek Desert and their geologic implications, northwest Nevada and northeast California [New Window]

Gravity and aeromagnetic data analysis described in a report, with a few physical property analyses

Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California [New Window]

Report with gravity station data in a spreadsheet

Principal facts for gravity stations in the Antelope Valley-Bedell Flat area, west-central Nevada [New Window]

Physical property data for selected rock samples accompany these gravity observations

Geophysical studies in the vicinity of the Warner Mountains and Surprise Valley, northeast California, northwest Nevada, and southern Oregon [New Window]

Gravity station data and physical property measurements used to infer subsurface geologic structure

Geochemical analyses of geologic materials from areas of critical environmental concern, Clark and Nye counties, Nevada [New Window]

Results of analysis in tabular form

Gravity studies of Cave, Dry Lake, and Delamar Valleys, East-Central Nevada [New Window]

Gravity surveys and structural interpretation of anomaly data in support of ground-water studies

Principal facts for gravity stations in the vicinity of Coyote Spring valley, Nevada, with initial gravity modeling results [New Window]

Gravity study to help define the shapes of young basins filled with Cenozoic rocks and alluvium, and to identify any possible faults within these basins that might influence the movement of groundwater.

Results of gravity fieldwork conducted in March 2008 in the Moapa Valley region of Clark County, Nevada [New Window]

Study aids understanding of local geologic structure and ground-water flow, includes principal facts for 266 gravity stations and physical properties of representative rock samples.

Digital data from the Taos West aeromagnetic survey in Taos county, New Mexico [New Window]

Digital data, image files, and text files describing data formats and survey procedures for an aeromagnetic survey covering the southwestern portion of Taos County west of the Town of Taos, New Mexico, conducted in October, 2006

Digital data from the Questa-San Luis and Santa Fe East helicopter magnetic surveys in Santa Fe and Taos Counties, New Mexico, and Costilla County, Colorado [New Window]

Aeromagnetic data collected during an airborne geophysical survey.

Digital data and derivative products from a high-resolution aeromagnetic survey of the central San Luis basin, covering parts of Alamosa, Conejos, Costilla, and Rio Grande Counties, Colorado, and Taos County, New Mexico [New Window]

Digital data, image files, and text files describing data formats and survey procedures for aeromagnetic data collected during a high-resolution aeromagnetic survey in southern Colorado and northern New Mexico during October, 2004

Digital aeromagnetic data and derivative products from a helicopter survey over the town of Taos and surrounding areas, Taos County, New Mexico. [New Window]

Flight-line data, grids, and images derived from them

Principal facts for gravity data collected in the southern Albuquerque Basin area and a regional compilation, central New Mexico [New Window]

New data incorporated with existing data complete overall coverage of the basin, one of the largest associated with the Rio Grande rift.

Digital data from the northeast Tusas Mountains aeromagnetic survey, north-central New Mexico [New Window]

Flight-line aeromagnetic observations with gridded data derived from them.

Geologic and aeromagnetic maps of the Fossil Ridge area and vicinity, Gunnison County, Colorado [New Window]

Geologic units, structural features, and aeromagnetic anomaly map of the area

Resource potential and geology of the Grand Mesa, Uncompahgre, and Gunnison (GMUG) National Forests and vicinity, Colorado [New Window]

Multi-chapter report combining geologic, geochemical, geophysical, and mining activity data. Downloadable data for coal resource information only.

Hydrogeochemical investigations of historic mining districts, central western slope of Colorado, including influence on surface-water quality [New Window]

Geochemical analysis of mine dumps, mill tailings, mine drainage, and surface waters indicate contamination from these historic mines is generally less than that asserted or suggested by some geochemical models

Hydrogeochemical investigation of the Standard Mine vicinity, upper Elk Creek basin, Colorado [New Window]

Ground- and surface-water samples were collected in order to characterize the local ground-water flow system, determine metal concentrations in local ground water, and understand factors controlling the discharge of metal-rich waters from the mine.

Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan mountains, Colorado [New Window]

New age determinations with descriptions of sample locations and analytical details.

Geochemistry of rock samples collected from the Iron Hill carbonatite complex, Gunnison county, Colorado [New Window]

A study conducted collected 57 surface rock samples from nine types of intrusive rock to reexamine the chemistry and metallic content of the major rock units of the Iron Hill complex

Geochronology Database for Central Colorado [New Window]

Compilation of isotopic and fission track age determinations, some previously published. Data for the tephrochronology of Pleistocene volcanic ash, carbon-14, Pb-alpha, common-lead, and U-Pb determinations on uranium ore minerals are not included.

Fluorine, fluorite, and fluorspar in central Colorado [New Window]

Distribution of fluorine in specific age-lithologic categories, ranging from precambrian metamorphic rocks to modern soils.

Spring runoff water-chemistry data from the Standard Mine and Elk Creek, Gunnison County, Colorado, 2010 [New Window]

Periodic sampling of water during the spring of 2010 was carried out to understand the range and timing of variation in pH and metal concentration, and help evaluate variation in water quality during spring runoff.

Geospatial database for regional environmental assessment of central Colorado [New Window]

Study focusing on the effects of historical mining on Forest Service lands in this area.

Aeromagnetic and gravity maps of the central Marysvale volcanic field, southwestern Utah [New Window]

Maps (no data) depicting aeromagnetic and Bouguer gravity anomaly in the study area. Report discusses rock sample density and magnetic properties, but data are buried in PDF tables.

Geophysical data from the Spring and Snake Valleys area, Nevada and Utah [New Window]

Existing and new gravity station data and magnetometer measurements used to infer geologic structure of this area

Preliminary isostatic gravity map of Joshua Tree National Park and vicinity, southern California [New Window]

Map with excel tables showing principal facts (gravity observation data).

Principal facts for gravity stations in the vicinity of San Bernardino, southern California [New Window]

Gravity measurements collected to help define the characteristics of the Rialto-Colton fault, with rock properties such as lithology, magnetic susceptibility and density.

Gravity map and data of the eastern half of the Big Bear Lake, 100,000 scale quadrangle, California, and analysis of the depths of several basins [New Window]

Data on the southern portion of the Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms and the Yucca Valley-Joshua Tree-Twentynine Palms area and presents the map and basin analyses.

Isostatic gravity map with geology of the Santa Ana 30'x60' quadrangle, southern California [New Window]

Contour map of isostatic gravity anomaly with bedrock geology, and principal facts for the gravity stations as a separate data file.

Gravity and magnetic investigations of the Mojave National Preserve and adjacent areas, California and Nevada [New Window]

Gravity station and rock physical property data used to infer geologic structure of the area

Analytical Results and Sample Locality Map for Rock, Stream-Sediment, and Soil Samples, Northern and Eastern Colorado Desert BLM Resource Area, Imperial, Riverside, and San Bernardino Counties, California [New Window]

A geochemical survey of the Bureau of Land Management's 5.5 million-acre Northern and Eastern Colorado Desert Resource Area

Gravity data from Dry Lake and Delamar Valleys, east-central Nevada [New Window]

Principal facts (gravity observations) for 185 new stations

Principal facts for gravity stations collected in 2010 from White Pine and Lincoln Counties, east-central Nevada [New Window]

Gravity observations from 99 locations in this area, with free-air, isostatic, and complete Bouguer anomalies.

Geochemical analyses of rock, sediment, and water from the region in and around the Tuba City landfill, Tuba City, Arizona [New Window]

Regional samples of rock, sediment, leachates, and water were collected in and around the TCL site and analyzed for major and minor elements and radionuclides

Geochemical data from analyses of rock, sediment, water, and solid-phase leaching at the Tuba City open dump, Tuba City, Arizona [New Window]

Study of sources and resulting transport of radionuclides and other dissolved constituents in the surrounding ground water.

Digital data for construction material sources reported by the Arizona Department of Transportation in 1977 for Maricopa County, Arizona [New Window]

Point features representing pit locations and attribution data captured from an atlas of map sheets and pit data sheets by the Arizona Highway Department

Physical-property measurements on core samples from drill-holes DB-1 and DB-2, Blue Mountain Geothermal Prospect [New Window]

Density and magnetic susceptibility measurements to assist in interpretation of gravity and magnetic anomaly data

Principal facts for gravity profiles collected near the Osgood Mountains and the Slumbering Hills, north-central Nevada [New Window]

Gravity station data for several surveys of this area.

High-resolution aeromagnetic survey to image shallow faults, Poncha Springs and vicinity, Chaffee county, Colorado [New Window]

Survey to map concealed faults that may be related to geothermal resources, such as hot springs; data given are surface locations of faults interpreted from the survey.

Digital data from the Great Sand Dunes and Poncha Springs aeromagnetic surveys, south-central Colorado [New Window]

Two high-resolution aeromagnetic surveys in south-central Colorado compiled to assess the subsurface geologic framework of the San Luis basin for ground-water flow model construction, and to map concealed faults potentially related to geothermal resources

Description and validation of an automated methodology for mapping mineralogy, vegetation, and hydrothermal alteration type from ASTER satellite imagery with examples from the San Juan Mountains, Colorado [New Window]

Raster image files indicating the interpreted alteration and mineral groups inferred using the methodology.

Gamma-ray, magnetic, and topographic data for parts of the Colorado Front Range [New Window]

Five geospatial grids from the NURE surveys, showing potassium, uranium, and thorium concentration, residual magnetic field, and digital elevation.

Isotopic ages of rocks in the northern Front Range, Colorado [New Window]

Maps, tables, and GIS data for isotopic ages determined in the northern part of the study area.

Uranium in surface waters and sediments affected by historical mining in the Denver West 1:100,000 quadrangle, Colorado [New Window]

Geochemical analysis of stream waters and sediments in mountainous areas immediately west of Denver, Colorado, to evaluate the concentration and distribution of uranium-bearing acid drainage originating from historical mines

Net acid production, acid neutralizing capacity, and associated geophysical, mineralogical, and geochemical characteristics of Animas River watershed rocks near Silverton, Colorado [New Window]

Geochemical analysis of rock samples focusing on characteristics relevant to mine cleanup discussions

Net acid production, acid neutralizing capacity, and associated mineralogical and geochemical characteristics of Animas River watershed igneous rocks near Silverton, Colorado [New Window]

Chemical analysis of altered volcanic rocks to determine their potential for neutralization of acid-rock drainage. Includes magnetic susceptibility measurements as well.

Temporal geochemistry data from five springs in the Cement Creek watershed, San Juan County, Colorado [New Window]

Seasonal geochemical data intended to understand formation of ferricretes and to help understand the ground-water flow system.

Radionuclide data and calculations and loss-on-ignition, X-ray fluorescence, and ICP-AES data from cores in catchments of the Animas river, Colorado [New Window]

Results from sediment cores collected during 1997-1999 oxbow lakes and beaver ponds to assess impact of historic mining and exposed mineral deposits on the quality of the water and the aquatic and riparian habitats.

Integrated investigations of environmental effects of historical mining in the Animas River watershed, San Juan county, Colorado [New Window]

Major assessment of the environmental effects of historical mining in the Animas River watershed with GIS data files, tables, and plates.

Geochemical data from waters in Prospect Gulch, San Juan County, Colorado, that span pre- and post-Lark Mine remediation [New Window]

Water samples near this abandoned mine were analyzed for specific conductance, pH, temperature, and dissolved oxygen with handheld field meters, and metals were analyzed using inductively coupled plasma-mass spectrometry.

Geologic and mineralogic controls on acid and metal-rich rock drainage in an alpine watershed, Handcard Gulch, Colorado [New Window]

Mineralogical data on samples from the surface and from drill cores, with geological observations help to understand the hydrology and effects of geology on acid-rock drainage in a mineralized alpine watershed.

Helicopter electromagnetic and magnetic survey maps and data, East Poplar oil field area, August 2004, Fort Peck Indian Reservation, northeastern Montana [New Window]

Grids, line data, and imagery derived from them covering the small study area.

Digital aeromagnetic data and derivative products from a helicopter survey over the town of Blanca and surrounding areas, Alamosa and Costilla Counties, Colorado [New Window]

Flight-line data, grids, and images derived from them

Thickness of Santa Fe group sediments in the Española Basin south of Santa Fe, New Mexico, as estimated from aeromagnetic data [New Window]

Interpretation of aeromagnetic data, with geologic structure, to infer thickness and estimate capacity of an aquifer.

Aeromagnetic interpretations for understanding the hydrogeologic framework of the southern Española Basin, New Mexico [New Window]

Analysis of geophysical data, inferring geologic structure of the study area

Merged digital aeromagnetic data for the middle Rio Grande and southern Española Basins, New Mexico [New Window]

Gridded data and images

Geophysical interpretations of the southern Española Basin, New Mexico, that contribute to understanding its hydrogeologic framework [New Window]

Geophysical interpretation of the southern Española basin for the purpose of understanding the hydrogeologic framework including shallow faults, igneous units, and basement rocks

Digital aeromagnetic data from the Sandoval-Santa Fe, Belen, and Cochiti airborne survey, covering areas in Rio Arriba, Sandoval, Santa Fe, Socorro, and Valencia Counties, New Mexico [New Window]

Grids and flight-line data for three airborne geophysical surveys

Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the Kuskokwim Bay region of southwest Alaska [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Digital data for the geologic framework of the Alaska Peninsula, southwest Alaska, and the Alaska Peninsula Terrane [New Window]

Geospatial data sets of the geology of the Alaska Peninsula, Alaska, including a geologic map and complete unit descriptions.

Lithogeochemistry of mineralized and altered rock samples from the northern Talkeetna Mountains, south-central Alaska [New Window]

Chemical analysis of 201 samples of rocks thought to be altered or mineralized in an area containing numerous mines.

Preliminary gravity and magnetic data of the Lake Pillsbury northern Coast Ranges, California [New Window]

Report with excel tables showing principal facts (gravity observation data) and ground magnetic data.

Geologic map of the Bartlett Springs Fault Zone in the vicinity of Lake Pillsbury and adjacent areas of Mendocino, Lake, and Glenn Counties, California [New Window]

Map and study intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide hazards, mineral potential, seismic velocity, and earthquake faults.

Aeromagnetic and aeromagnetic-based geologic maps of the Coastal Belt, Franciscan Complex, northern California [New Window]

New aeromagnetic point observation data with grids as well

Major- and trace-element concentrations in soils from northern California: Results from the Geochemical Landscapes project pilot study [New Window]

Regional-scale geochemical survey designed to serve as a baseline for further analyses, and to understand effects of historical mining in the area.

Principal facts for gravity data along the Hayward fault and vicinity, San Francisco Bay area, northern California [New Window]

Data and associated physical property measurements were collected as part of on-going studies to help determine the earthquake hazard potential of major faults within the San Francisco Bay region

Preliminary isostatic gravity map of the Sonoma Volcanic field and vicinity, Sonoma and Napa counties, California [New Window]

Gravity station data from three separate surveys

Geologic and geophysical framework of the Santa Rosa 7.5' quadrangle, Sonoma county, California [New Window]

Geologic units, structural features, magnetic and gravity anomaly contours and radiometric ages of this area

Environmental impact of the Contact and Sonoma mercury mines on water, sediment, and biota in Anna Belcher and Little Sulphur Creek watersheds, Sonoma County, California [New Window]

Data from field sampling of tailings, waste rock, sediment, and water at the mines, along with water, sediment, and biota in a pond and tributaries that drain from the mine area, to help assess the chemical hazards due to historic mining.

Helicopter electromagnetic and magnetic survey data and maps, northern Bexar County, Texas [New Window]

Grids, images, and flight-line paths for magnetic and resistivity surveys

Data report for the geologic and scenic quality evaluation of selected sand and gravel sites on the Wind River Indian Reservation, Wyoming [New Window]

Geographic extent of sand and gravel deposits in this area as GIS data.

Gravity data from Newark Valley, White Pine county, Nevada [New Window]

Gravity station data, isostatic anomaly map, and depth to basement map derived from geophysical inverse modeling.

Ground magnetic data from within the Long Valley Caldera, California [New Window]

Results of a detailed ground magnetic survey

Aeromagnetic surveys in Yukon Flats Alaska [New Window]

Flight-line data from the aeromagnetic survey

Map showing extent of glaciation in the Eagle quadrangle, east-central Alaska [New Window]

This map covers the Eagle 1:250,000-scale quadrangle in the northeastern part of the Yukon-Tanana Upland in Alaska. It shows the extent of five major glacial advances, former glacial lakes, and present fragmented terrace deposits related to the advances.

Magnetic susceptibilities measured on rocks of the Upper Cook Inlet, Alaska [New Window]

Analysis of rock samples, with photos of sample localities

Principal facts for 463 gravity stations in the vicinity of Tangle Lakes, east-central Alaska [New Window]

New gravity stations combined here with older measurements taken by other USGS survey trips

Chemical data for rock, sediment, biological, precipitate, and water samples from abandoned copper mines in Prince William Sound, Alaska [New Window]

Report containing tables of geochemical data

Preliminary geologic map of the Chugach National Forest special study area, Alaska [New Window]

Map at 1:63,360 scale shows the bedrock geology of a special study area within the Chugach National Forest, Alaska. Includes ARC/Info export files and graphics.

Geologic field notes, geochemical analyses, and field photographs of outcrops and rock samples from the Big Delta B-1 quadrangle, east-central Alaska [New Window]

Major element oxide and trace element geochemical analyses, including those for gold, silver, and base metals, for representative rock units and for grab samples from quartz veins and mineralized zones within the quadrangle

Geochemical data for stream-sediment, surface-water, rock, and vegetation samples from Red Mountain (Dry Creek), an unmined volcanogenic massive sulfide deposit in the Bonnifield district, Alaska Range, east-central Alaska [New Window]

Geochemical data for stream sediment, surface-water, rock, precipitate, and vegetation samples from Red Mountain

Helicopter electromagnetic and magnetic survey data and maps, Seco Creek area, Medina and Uvalde Counties, Texas [New Window]

Airborne geophysical data and a summary of the hydrologic application.

Aeromagnetic survey of Medina and Uvalde Counties, Texas [New Window]

Flight-line data, flight-line and aeromagnetic anomaly map images

Distribution of igneous rocks in Medina and Uvalde counties, Texas, as inferred from aeromagnetic data [New Window]

High resolution aeromagnetic survey used to infer the locations of igneous rock bodies in the area, which are provided in GIS data files

Three-dimensional geologic model of complex fault structures in the upper Seco Creek area, Medina and Uvalde counties, south-central Texas [New Window]

Data sets include drill-hole from core and geophysical logs, surface geology and elevation, and helicopter electromagnetic survey data. The model may be explored and .jpg or .tiff images or using specialized software provided.

Description of digital aeromagnetic data collected north and west of Albuquerque, New Mexico [New Window]

Grids and images depicting the data

Hawai`i geologic map data [New Window]

A GIS database of geologic units and structural features in Hawai`i, with lithology, age, data structure, and format written and arranged just like the other states.

Isostatic gravity map with simplified geology of the Los Angeles 30'x60' Quadrangle [New Window]

Includes detailed point measurements of gravity

Preliminary potential-field constraints on the geometry of the San Fernando basin, southern California [New Window]

Results of mathematical modeling of gravity and magnetic anomaly data to infer the geologic structure of the area

Gravity data along LARSE (Los Angeles Regional Seismic Experiment) line 2, southern California [New Window]

Data taken across the San Fernando Basin and Transverse Ranges to help characterize the structure underlying this area

Major- and trace-element concentrations in soils from two geochemical surveys (1972 and 2005) of the Denver, Colorado, metropolitan area [New Window]

Analyses of about 900 samples by ICP-MS, ICP-AES, and hydride generation-atomic absorption spectrometry. The samples collected in 2005 were also analyzed by a cold vapor-atomic absorption method for mercury.

A helicopter-borne magnetic survey over Dixie Valley geothermal field, Nevada [New Window]

Gridded data from helicopter study of shallow geologic structures

Field demonstrations of five geophysical methods that could be used to characterize deposits of alluvial aggregate [New Window]

Data from seismic reflection and refraction, electromagnetic sounding, and resistivity profiling in a study area in Indiana. Exact location is not provided.

Aerial magnetic, electromagnetic, and gamma-ray survey, Berrien county, Michigan [New Window]

Maps, grids, and flight-line databases of a detailed aerial survey and maps and grids of satellite data

Time-domain electromagnetic soundings near Antioch, Illinois,and Berrien Springs, Michigan [New Window]

Study to help constrain 3-dimensional geologic maps of surficial materials in these glacial deposits

Geophysical investigation of Red Devil mine using direct-current resistivity and electromagnetic induction, Red Devil, Alaska, August 2010 [New Window]

This large producer of mercury operated from 1933 to 1971. As part of remediation work, this survey used electromagnetic methods to study subsurface resistivity.

High resolution, low altitude aeromagnetic and electromagnetic survey of Mount Rainier [New Window]

Flight-line and gridded data, with description of methodology and interpretation

Puget Sound (Washington) aeromagnetic maps and data [New Window]

Gridded data and maps for individual quadrangles and for the entire compilation

Revised digital aeromagnetic data for areas in and adjacent to the National Petroleum Reserve Area (NPRA), North Slope, Alaska [New Window]

Redigitized and corrected data from a previously published study

The Longview/Lakeview barite deposits, southern National Petroleum Reserve, Alaska (NPRA); potential-field models and preliminary size estimates [New Window]

Geophysical modeling used to study mineral deposit geometry. Includes 227 new gravity stations.

Mercury geochemistry of gold placer tailings, sediments, bedrock, and waters in the lower Clear Creek area, Shasta County, California; report of investigations, 2001-2003 [New Window]

Total mercury and methylmercury measured in sediments, tailings, and water in an area where historical gold mining has occurred; proposed habitat restoration work may release some of the mercury that is currently buried there.

Environmental impact of the Helen, Research, and Chicago mercury mines on water, sediment, and biota in the Upper Dry Creek watershed, Lake County, California [New Window]

Data from field sampling of tailings, waste rock, sediment, and water at the mines, along with water, sediment, and biota in a pond and tributaries that drain from the mine area, to help assess the chemical hazards due to historic mining.

Impact of mine and natural sources of mercury on water, sediment, and biota in Harley Gulch adjacent to the Abbott-Turkey Run mine, Lake County, California [New Window]

Detailed samples around these abandoned mines will help to determine how well site remediation efforts have worked to reduce the dangerous levels of mercury that come from both natural sources here as well as the abandoned mines.

Map showing geology, structure, and geophysics of the central Black Hills, South Dakota [New Window]

This 1:100,000-scale digital geologic map details the complex early Proterozoic granitic rocks, early Proterozoic supracrustal metamorphic rocks, and Archean crystalline basement of the Black Hills.

Mineralogic causes of variations in magnetic susceptibility of late Pleistocene and Holocene sediment from Great Salt Lake, Utah [New Window]

Results of magnetic susceptibility (MS) measurements and magnetic mineralogy of sediments sampled in three cores from the south basin of Great Salt Lake

Geophysical studies of the Crump Geyser known geothermal resource area, Oregon, in 1975 [New Window]

Gravity map and data used to infer details of the geologic structure of the area. Surveys were conducted during or prior to 1975.

Geochemical and stable isotopic data on barren and mineralized drill core in the Devonian Popovich Formation, Screamer sector of the Betze-Post gold deposit, northern Carlin trend, Nevada [New Window]

Detailed chemical and isotopic analysis of host and associated rocks within an area that is currently the largest producer of gold in the US. Part of a study of the hydrothermal activity leading to the formation of these gold deposits.

Available sand and gravel resources in southern New Hampshire [New Window]

Estimates thickness of sand and gravel resources available in this broad area using geology, topography, land cover, and ground-water level.

Estimated gravel resources of the Soucook River valley, Loudon, New Hampshire, 7.5' Quadrangle using improved techniques for assessing gravel resources in glaciofluvial deposits [New Window]

Images and text from a poster session (Geological Society of America Northeastern Section) showing methodology and results for an example

Application of ground penetrating radar to estimate sand and gravel resources near Bow, southern New Hampshire [New Window]

Includes application-specific radar data files.

Geochemical data from groundwater at the proposed Dewey Burdock uranium in-situ recovery mine, Edgemont, South Dakota [New Window]

Groundwater geochemistry data from samples that were collected in June 2011 to better understand the hydrogeologic system in the area surrounding the proposed mine site.

Online files for acid deposition sensitivity map [New Window]

GIS data files Acid Deposition Sensitivity of the Southern Appalachian Assessment Area. Susceptibility to acid deposition from air pollution is categorized as low, medium, or high for each area.

Geologic Map of the Great Smoky Mountains National Park Region, Tennessee and North Carolina [New Window]

Bedrock and surficial geologic units and structural features in this area

Audio-magnetotelluric data from the Culpeper basin, Loudoun, Fauquier, Fairfax, Prince William, Culpeper, and Orange counties, Virginia [New Window]

Geology and mineral deposits of the Keweenaw Peninsula and vicinity, Michigan [New Window]

Geospatial data and tabular data on the geology, structure, mines and mineral deposits, including lithology, age, tectonic setting, and stratigraphy.

Bedrock soil and lichen geochemistry from Isle Royale National Park, Michigan [New Window]

Geochemical analyses conducted as part of a larger study of the Midcontinent Rift in the Lake Superior region.

Reconnaissance geologic map of the Duncan Canal/Zarembo Island area, southeastern Alaska [New Window]

Updated bedrock geologic mapping of the area incorporating a recent airborne geophysical survey, new field work, fossils, radiometric ages, and geochemical signatures. Includes GIS data.

Preliminary bedrock geologic map of the Seward Peninsula, Alaska, and accompanying conodont data [New Window]

Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.

Concentrations and bioaccessibility of metals in vegetation and dust near a mining haul road, Cape Krusenstern National Monument, Alaska [New Window]

Samples of surficial materials analyzed for aluminum, barium, cadmium, lead, and zinc concentrations.

Helicopter electromagnetic and magnetic geophysical survey data, Oakland, Ashland, and Firth study areas, eastern Nebraska, March 2007 [New Window]

Electrical resistivity depicted in georeferenced grids and maps, representing different approximate depths of investigation for each area. The range of subsurface investigation is comparable to the depth of shallow aquifers.

Gravity investigations of the Chickasaw National Recreation Area, south-central Oklahoma [New Window]

Gravity anomaly with physical property measurements in support of structural geologic investigation

Helicopter electromagnetic and magnetic geophysical survey data, Hunton anticline, south-central Oklahoma [New Window]

Flight line data, grids, and inversions for these surveys are intended to help understand shallow groundwater and develop groundwater resource plans for the aquifer.

Geochemical and mineralogical characterization of the abandoned Valzinco (lead-zinc) and Mitchell (gold) mine sites prior to reclamation, Spotsylvania County, Virginia [New Window]

Geochemical data for all solid sample media, along with mineralogical data, and results of weathering experiments on Valzinco tailings and field experiments on sediment accumulation in Knights Branch.

Geochemical characterization of drainage prior to reclamation at the abandoned Valzinco mine, Spotsylvania County, Virginia [New Window]

Geochemical analysis of water samples to provide a pre-reclamation assessment of seasonal variations of acid and metal concentrations in Knight's Branch help evaluate the reclamation project.

Gravity study of the Guernsey landfill site, Guernsey, Wyoming [New Window]

Gravity measurements and surveyed topography data

Results of electrical resistivity data collected near the town of Guernsey, Platte county, Wyoming [New Window]

A study to investigate subsurface geologic conditions as they relate to ground-water flow in an abandoned landfill.

Mercury release from the Rathburn Mine, Petray Mine, and Bear Valley saline springs, Colusa County, California 2004-2006 [New Window]

Summary of data obtained from field sampling of mine tailings and waste rock and water and sediment in regional springs and tributaries that drain from the mine area into Bear Creek. Ground-water springs are also potential sources of mercury here.

Helicopter electromagnetic data from Everglades National Park and surrounding areas, Florida, collected 9-14 December 1994 [New Window]

Survey to determine location of the freshwater-saltwater boundary in a coastal area.

Water and sediment chemical data and data summary of samples collected in 1999 and 2001 in the Goodpaster River Basin, Big Delta B-2 Quadrangle, Alaska [New Window]

Review of samples of sediment, tailings, and waters adjacent to the Cactus Queen gold mine, Kern County, California [New Window]

Mine tailings here have high levels of arsenic. Experiments conducted on these sediments indicate that the arsenic can be released into the environment and become hazardous through chemical processes that occur when fine sediment is ingested by animals.

Aeromagnetic surveying in Wisconsin 1998-99 [New Window]

Aeromagnetic flight-line measurements and gridded anomaly data

Regional geochemical results from the reanalysis of NURE stream sediment samples--Eagle 3 degree quadrangle, east-central Alaska [New Window]

Reanalyses of NURE sediment samples in the Fortymile mining district, east-central Alaska. Provides new lower limits for some elements. Compares data from newer analytical techniques with original NURE data.

Geochemical data for core and bottom-sediment samples collected in 2007 from Grand Lake o' the Cherokees, northeast Oklahoma [New Window]

In this area of historical lead-zinc mining activity, studies such as this help to assess the possibility of human exposure to cadmium and lead through eating fish.

Geology, geochemistry, and genesis of the Greens Creek massive sulfide deposit, Admiralty Island, southeastern Alaska [New Window]

This metal ore deposit formed over a period of time in which its tectonic setting was changing, consequently it shows a range of characteristics typical of several different types of deposits. Rock geochemistry data are provided in tabular form.

Geology, geochemistry, and geophysics of the Fry Canyon uranium/copper project site, southeastern Utah - Indications of contaminant migration [New Window]

Chemical analyses of water and sediment samples, images depicting resistivity.

Helicopter electromagnetic and magnetic geophysical survey data, portions of the North Platte and South Platte Natural Resource Districts, western Nebraska, May 2009 [New Window]

Geophysical surveys to map shallow hydrogeologic features of the southwestern part of the Sand Hills that contain a mix of fresh to saline lakes.

Airborne electromagnetic mapping of the base of aquifer in areas of western Nebraska [New Window]

Gridded data used to revise base of aquifer, with supporting elevation data.

Ni-Co laterite deposits of the world-database and grade and tonnage models [New Window]

Location, type, mineralogy, name, tonnage and grade, and geological setting for 120 deposits of this type. The US has no active nickel mines or nickel reserves.