Scientific data near [38.04185,-120.64684]

Search area extends approximately 2.2 km east-west and 2.8 km north-south.

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Geology of US states

Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format

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Unit	State	Lithology
Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains)	CA	Triassic to Late Jurassic
Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains)	CA	Jurassic

Airborne geophysical surveys

Aerial surveys of magnetic anomaly and gamma ray emission; older surveys were analog record which have been digitized, newer surveys collected data in digital form.

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ID	Data type	Description
Mother Lode '51	M-Dz	Mother Lode '51 4224 line km with spacing 0.80 km over parts of CA
Sacramento	M/R-D	Sacramento 5005 line km with spacing 4.80 km over parts of CA

Estimates of undiscovered mineral resources

National Mineral Resource Assessment 1998: Estimates of the number of undiscovered mineral resources of gold, silver, copper, lead, and zinc within identified permissive tracts (geographic areas in which mineral deposits may form).

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Tract	Deposit Type	Mineralization age
PC03	Skarn Cu	Mesozoic
PC08	Porphyry Cu	Mesozoic
PC17	Massive sulfide, Sierran kuroko	Jurassic
PC40	Low-sulfide Au-quartz vein	Mesozoic

The continental crust

Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

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Domain	Crust type	Region
Foothills-Wallowa	Oceanic arc	Western Cordillera
Calaveras-Baker	Accretionary wedge	Western Cordillera

Geochemistry of stream sediments in the US from the NURE-HSSR database

National-scale geochemical analysis of stream sediments and soils in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
5191503	1980-04-24	Stream sediment sample from dry stream, sieved to less than 149 microns (-100 mesh), and dried (if necessary) at less than or equal to 110øC.

Geochemistry of water samples in the US from the NURE-HSSR database

National-scale geochemical analysis of water samples in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
1111088	1980-04-24	Spring water sample filtered through a 0.8 micron filter at the site.
1111089	1980-04-24	Spring water sample filtered through a 0.8 micron filter at the site.

National Geochemical Database: Rock

Geochemical analysis of rock samples collected and analyzed by the USGS. This dataset includes and supersedes rock data formerly released as "Geochemistry of igneous rocks in the US extracted from the PLUTO database"

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Sample ID	Rock type	Rock name
D261577	igneous	andesite
ERH724

Mineral Resource Data System

MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic characteristics, production, reserves, resources, and references.

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Site name	Development	Commodities
Nassau	Past Producer	CU ZN AG AU
Clary and Langford Mine Porter and Spring Nassau	Producer	CR
Clary and Langford	Past Producer	CR FE
Hinch Mine	Producer	CR
Hinch Mine	Past Producer	CR FE
Goat Ranch	Unknown	AU
Goat Ranch	Past Producer	AU
Nassau	Unknown	CU AU AG ZN

An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (web-accessible database)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

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Deposit name	Deposit type	Location
Hinch Mine	Producer	California, United States
Hinch Mine	Past Producer	California, United States

National Geochemical Database: Sediment

Geochemical analysis of sediment samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are of stream sediment in the continental US and Alaska.

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Sample ID	Sample source	Sample notes
C240726	stream/river	NURE Archived Stream Sediment

Global assessment of undiscovered copper resources

Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.

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Tract name	Deposit type	Geology
Cascade Arc	porphyry copper	U.S. part of a continental margin arc that formed during subduction of the Pacific and Juan de Fuca plates beneath western North America
Sierran Arc	porphyry copper	A composite island-continental margin arc that formed during subduction of the Farallon Plate beneath western North America
Western U.S. and Sonoran Desert Jurassic Arc	porphyry copper	U.S. and Mexican parts of a composite island-continental margin arc that formed during subduction of the Farallon Plate beneath western North America

Prospect- and mine-related features on USGS topographic maps

Symbols indicating mining-related features digitized from historical USGS topographic maps in the western part of the conterminous US. Includes prospect pits, mine shafts and adits, quarries, open-pit mines, tailings piles and ponds, gravel and borrow pit

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Feature ID	Feature type	Feature name
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point
Mine Shaft	point
Prospect Pit	point