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.

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.

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

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

Detailed descriptions of more than 200 mineral districts, mines, and mineral occurrences (deposits, prospects, and showings) within the United States that are reported to contain substantial enrichment of rare earth elements.

Geologic unit contacts, faults, dikes, and folds in this area, in map form as well as geospatial datasets.

Geochemical analyses of samples from stream sediments, magnetic heavy-mineral concentrates, nonmagnetic heavy-mineral concentrates, slightly magnetic to nonmagnetic heavy-mineral concentrates, and rocks. All were analyzed by semi-quantitative 6-step emission spectrography. Some of the stream sediment samples were also analyzed by flame-atomic absorption spectrophotometry. Data are provided in Microsoft Access format and as tab-delimited text.

Water characteristics (measured in situ) and laboratory geochemical analysis of water and sediment in this area to quantify the increase in dissolved constituents in streams attributable to historical mining activity. Data are provided in CSV format.

Garnet Lu-Hf ages of the schist of Moores Station Formation and a cross-cutting garnetiferous felsic dike in this area. These ages provide part of the early geologic history leading up to ore deposition. Data are provided in CSV format.

Instrument, standard, and sample data from application of in situ laser ablation-inductively coupled plasma-mass spectrometry dating of scheelite in thin section, and sample data from isotope dilution thermal ionization mass spectrometry scheelite dating. Data are provided in CSV format.

A Geologic Map Schema (GeMS)-compliant version that updates the GIS files for the geologic map. Data are provided in Esri file geodatabase and shapefile formats.

A Geologic Map Schema (GeMS)-compliant version that updates the GIS files for the geologic map. Data are provided in Esri file geodatabase and shapefile formats.

A Geologic Map Schema (GeMS)-compliant version that updates the GIS files for the geologic map. Data are provided in Esri file geodatabase and shapefile formats.

Geochemical data from the re-analysis of 44 rock samples collected between 1966 and 1970, and 107 sediment samples collected in 1966 and 1967 for a study investigating the mineral resources of this area. Data are provided in CSV format.

Chemistry and geologic information for nearly 30,000 historic ore and ore-related rock samples from mineral deposits and mining districts in the United States. Data are provided in Microsoft Access and CSV formats.

Chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States and from archetypal deposits from 27 other countries. Data are provide in Microsoft Access, Microsoft Excel, and CSV formats.

Detailed descriptions of mineral deposits containing this commodity, including history, production, resource estimates, and geographic features. Data are provided in CSV, shapefile, Microsoft Excel, and Esri file geodatabase formats.

Ar/Ar data for samples that record the mineralization of the area. Data are provided in CSV format.

Data collected to determine geologic background concentrations of trace metals in water and stream sediment, and to quantify the increase in dissolved constituents in streams attributable to historical mining activity in this area. Data are provided in CSV format.

Resource assessment and supporting data including permissive tracts, mineral sites in the study area, geologic units, geologic maps, stream sediment geochemistry, whole rock chemistry, airborne radiometric data, and lower frequency content EMAG2 data. Data are provided in Esri file geodatabase, shapefile, and CSV formats.

Geologic map units, faults, structural lines meaning axial traces, structural points like bedding strike and dip locations, cross section lines, drill core sample locations, open pit polygons or outlines, and general mining features such as the location of an adit. Data are provided in shapefile format.

Previously unpublished geochemical data from 1966-1984 projects to describe the geology, determine petrologic and geochemical characteristics and to evaluate the mineral resource potential of the primitive areas and of adjacent study areas. Data are provided in Microsoft Access, shapefile, and CSV formats.

Geochemical data from selected USGS projects from the 1960s-1980s that were previously not published as digital data. Includes geochemical analyses from 36,498 samples of various types using analytical methods and instruments that were current when those studies were carried out. Data are provided in Microsoft Access, shapefile, and CSV formats.

Geochemical reanalysis of 23 rock and 85 sediment samples collected between 1966 and 1970 by USGS to characterize the regional impact of legacy mining in this area. Data are provided in CSV format.

Uranium and lead isotope ratios from (1) scheelite from ore deposits near Mallnock, Austria, (2) wolframite from the Wolfram Camp mine, Australia, and (3) scheelite from the Andrew Curtis mine near Los Angeles, California. Data are provided in CSV format.

Geochronology data to determine the ages of Challis igneous rocks in this area to help understand the stratigraphy and lithologic characteristics of these igneous rocks. Data are provided in CSV format..

Whole rock geochemical data for volcanic rocks in this area, both extrusive rocks and hypabyssal dikes. Major oxides and trace elements are included. Data are provided in CSV format.