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Rocks and deposits
Solid masses that make up the earth's crust as well as accumulations of materials. Use for major rock types and unconsolidated deposits. For deposits of economic value, see related terms.
Subtopics:
Fossils (4 items)
Igneous rocks (55 items)
Mineral deposits (25 items)
Permafrost (1 items)
Petroleum (2 items)

Lithologic maps (39 items)


Results 1 - 10 of 229 listed by similarity [list alphabetically]
Methods to create GIS styles with examples for lithology and time
Methods used to create several styles for lithology or geologic time, including style files for Lithclass lithologic categories, and ISC and DNAG timescales.
Geologic field notes and geochemical analyses of outcrop and drill core from Mesoproterozoic rocks and iron-oxide deposits and prospects of southeast Missouri
Field notes, locations, rock descriptions, and geochemical analyses from a 1988 to 1994 study to facilitate new research efforts in IOCG (iron-oxide deposits in context with other iron oxide-copper ± uranium) deposit types.
A geochemical isotopic (Nd-Pb) comparison of volcanic rocks erupted during the last 3,550 yrs. B.P. of interplinian activity of Somma-Vesuvius Volcano, southern Italy
Nd and Pb isotopic analyses from stratigraphic sampling from Somma-Vesuvius volcanic complex, Italy, during the last 3550 years point to contributions from heterogeneous lithosphere, continental crust, and magma mixing.
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
Chemical analyses for 31 samples collected from various phosphate mine sites in southeastern Idaho (25), northern Utah (2), and western Wyoming (4)
PDF Complete analytical data for Jurassic igneous rocks in the Bald Mountain mining district, Nevada
Petrographic and geochemical analyses of 50 outcrop samples and 58 drill core samples.
Cretaceous magmatic rocks of Alaska
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)
Distribution of igneous rocks in Medina and Uvalde counties, Texas, as inferred from aeromagnetic data
High resolution aeromagnetic survey used to infer the locations of igneous rock bodies in the area, which are provided in GIS data files
Geochronology and correlation of Tertiary volcanic and intrusive rocks in part of the southern Toquima Range, Nye County, Nevada
40Ar/39Ar dating, electron microprobe analyses and geologic mapping help clarify chronology and correlations of the numerous volcanic and intrusive units exposed in the area and interpret the petrogenesis of a few of the volcanic units.
Geochronology of Cenozoic rocks in the Bodie Hills, California and Nevada
Presents data for mineral deposits and unaltered and hydrothermally altered volcanic rocks. Data presented were acquired in three USGS labs by three different geochronologists. Analytical methods and data derived from each lab are presented separately.
Isotopic ages of rocks in the northern Front Range, Colorado
Maps, tables, and GIS data for isotopic ages determined in the northern part of the study area.
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