Scientific data near [45.61170,-112.30495]

Search area extends approximately 2.2 km east-west and 3.2 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Madison	county
Montana	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Twin Bridges	quadrangle 1:24,000 scale
Butte South	quadrangle 1:100,000 scale
Dillon	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Jefferson	hydrologic unit
Missouri Headwaters	hydrologic accounting unit
Missouri Headwaters	hydrologic subregion
Missouri	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
Alluvium	MT	Quaternary
Gravel	MT	Quaternary
Upper Tertiary sediment or sedimentary rock	MT	Tertiary

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
Boulder Batholith	M-Dz	Boulder Batholith 4972 line km with spacing 3.20 km over parts of MT
Dillon	M/R-D	Dillon 4359 line km with spacing 4.80 km over parts of MT-ID

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
NR10	Porphyry Cu (North America)	Cretaceous - Eocene

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
Great Falls	Intracratonic mobile belt	Northern Rocky Mountains

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
Northern Rocky Mountains	porphyry copper	Part of a continental margin arc that formed along the western margin of North America
Pacific Margin	porphyry copper	Cretaceous through middle Tertiary volcanic and intrusive rocks representing a series of continental- and island-arc systems accreted and superimposed onto the paleomargin of northeast Asia.

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
Open Pit Mine	point
Gravel Pit	point