Woodruff, Laurel G.

About the author

U.S. Geological Survey, Eastern Region, Midwest area, Geology discipline
Aluminum, Antimony, Arsenic, Atomic absorption analysis, Atomic emission spectroscopy, Barium, Bedrock geologic units, Beryllium, Bismuth, Business and economics, Cadmium, Calcium, Carbon, Cerium, Cesium, Chemical elements, Chromium, Cobalt, Copper, Datasets, Dysprosium, Economic geology, Environmental health (human), Erbium, Europium, Field inventory and monitoring, Field sampling, Gadolinium, Gallium, Geochemistry, Geologic contacts, Geologic maps, Geologic structure, Geology, Geospatial datasets, Holmium, Indium, Iron, Isotopic analysis, Lanthanide series elements, Lanthanum, Lead, Lichens, Lithium, Lutetium, Magnesium, Manganese, Manuals, Maps and atlases, Mass spectroscopy, Mercury, Mercury contamination, Metallic mineral resources, Mine drainage, Mine waste, Mineral deposits, Mineral resources, Mineralogy, Molybdenum, Natural resource exploration, Neodymium, Nickel, Niobium, Phosphorus, Plutonic rocks, Potassium, Praseodymium, Promethium, Rare earth elements, Resource supply and demand, Rubidium, Samarium, Scandium, Sedimentary rocks, Selenium, Silver, Sodium, Soil chemistry, Statistical analysis, Stratigraphy, Strontium, Structural geology, Study areas, Sulfur, Tellurium, Terbium, Thallium, Thorium, Thulium, Tin, Titanium, Toxic trace element contamination, Transect sampling, Tungsten, Unconsolidated deposits, Uranium, Vanadium, Volcanic rocks, X-ray diffraction, Ytterbium, Yttrium, Zinc, Mineral deposit areas, Basalt, Mixed volcanic/clastic rock, Rhyolite, ArcInfo interchange, HTML table, KML, Microsoft Excel format, OGC WFS, OGC WMS, Portable Document Format, Comma-delimited text, File geodatabase (ESRI), Shapefile, Tab-delimited text, Rare earths, Titanium

Bedrock and soil geochemistry from Voyageurs National Park, Minnesota

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

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Bedrock soil and lichen geochemistry from Isle Royale National Park, Michigan

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

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A deposit model for magmatic iron-titanium-oxide deposits related to Proterozoic massif anorthosite plutonic suites

This descriptive model for magmatic iron-titanium-oxide (Fe-Ti-oxide) deposits hosted by Proterozoic age massif-type anorthosite and related rock types presents their geological, mineralogical, geochemical, and geoenvironmental attributes. Although these

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Titanium--Light, strong, and white

Explains how and where titanium resources form and concentrate and how they are used and interact with the environment to affect human and ecosystem health. Discusses supply and demand trends and where undiscovered sources of titanium might be found.

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Titanium

Titanium colors paint, paper, plastic, rubber, and wallboard. Because of its strength and corrosion resistance, titanium metal and its alloys are used in the aerospace industry as well as for welding rod coatings, biological implants, and consumer goods.

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

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

Geologic units and structural features, GIS data files

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Occurrence model for magmatic sulfide-rich nickel-copper-(platinum-group element) deposits related to mafic and ultramafic dike-sill complexes

Magmatic sulfide deposits containing nickel and copper, with or without platinum-group elements, account for approximately 60 percent of the world’s nickel production. Most of the remainder of the Ni production is deriv

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Geologic map of the Ontonagon and part of the Wakefield 30' x 60' quadrangles, Michigan; a digital representation of Map I-2499 (1995)

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

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

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.

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

Spreadsheets containing geochemical data for soils

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

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.

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Geochemical and mineralogical data for soils of the conterminous United States

Systematic geochemical and mineralogical survey of soil horizons analyzed using a consistent set of methods, sample spacing 1 per 1,600 sq km.

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Geochemical and mineralogical data for soils of the conterminous United States

Systematic geochemical and mineralogical survey of soil horizons analyzed using a consistent set of methods, sample spacing 1 per 1,600 sq km.

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Geochemical and mineral maps from soils of the conterminous United States: interactive web site

Interactive web site showing geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801

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Geochemical and mineralogical maps for soils of the conterminous United States

Geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801

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Solid-phase arsenic speciation in aquifer sediments: A micro-X-ray absorption spectroscopy approach for quantifying trace-level speciation

e of this research is to identify the solid-phase sources and geochemical mechanisms of release of As in aquifers of the Des Moines Lobe glacial advance. The overarching concept is that conditions present at the aquifer-aquitard interfaces promote a suite

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Geochemical and mineralogical maps, with interpretation, for soils of the conterminous United States

Between 2007 and 2013, the U.S. Geological Survey conducted a low-density (1 site per 1,600 square kilometers, 4,857 sites) geochemical and mineralogical survey of soils in the conterminous United States. The sampling protocol for the national-scale surve

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Major, minor, and trace element compositions of bulk drill core samples from the Duluth Complex

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Oxide and cation compositions of feldspar grains from drill core of the Duluth Complex, Minnesota

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Oxide and cation compositions of olivine grains from drill core in the Duluth Complex, Minnesota

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Oxide and cation compositions of pyroxene grains from drill core of the Duluth Complex, Minnesota

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GIS and data tables for focus areas for potential domestic nonfuel sources of rare earth elements

Locations of focus areas to be used for planning and collection of geophysical, geological, and topographic (lidar) data pertaining to the study of rare earth element resources in the US.

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