Scientific data near [37.95000,-120.56000]

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

Geographic context

Counties, states, countries, continents, or oceans
Calaveras	county
California	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
New Melones Dam	quadrangle 1:24,000 scale
Oakdale	quadrangle 1:100,000 scale
San Jose	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Upper Stanislaus	hydrologic unit
San Joaquin	hydrologic accounting unit
San Joaquin	hydrologic subregion
California	hydrologic region

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
Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains)	CA	Jurassic
Ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains)	CA	Late Proterozoic(?) to Early 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
Central Sierra Nevada	M-Dz	Central Sierra Nevada 7378 line km with spacing 0.60 km over parts of CA
Mother Lode '51	M-Dz	Mother Lode '51 4224 line km with spacing 0.80 km over parts of CA
San Jose	M/R-D	San Jose 5182 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

Asbestos mines, prospects, and occurrences in the US

Location and mineralogical characteristics of former mines, prospects, and occurrences of asbestos in the continental US. No asbestos producing mines are currently active. Data here are drawn from several previously published reports.

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Deposit name	Deposit type	Location
Liberty (McFall) chromite mine	occurrence	Calaveras, CA

Podiform chromite deposits

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.

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Record	Type	Comment
Liberty
Mayflower
Dean
Holbrook and McGuire Group 3
Holbrook and McGuire Group 1
Bowie Estate 1

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
D261592	igneous	basalt

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
Liberty Mine	Past Producer	CR FE
Bowie Estate	Past Producer	CR FE
Mayflower Chrome Mine Burnham and Wilson Mine	Producer	CR
Bowie Estate	Producer	CR
Liberty Mine Mcfall	Producer	CR
Mayflower Chrome Mine	Past Producer	CR FE
Dean Mine	Producer	CR
Dean Mine	Unknown	CR

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
Liberty Mine Mcfall	Producer	California, United States
Mayflower Chrome Mine Burnham and Wilson Mine	Producer	California, United States
Bowie Estate	Producer	California, United States
Dean Mine	Producer	California, United States
Bowie Estate	Past Producer	California, United States
Holbrook and Mcguire Mine	Past Producer	California, United States
Mayflower Chrome Mine	Past Producer	California, United States
Liberty Mine	Past Producer	California, United States
Dean Mine	unclassified	California, United States

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
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Prospect Pit	point
Strip Mine	polygon