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A mineral resource assessment was performed by the U.S. Geological Survey (USGS) to assess the potential of undiscovered skarn-hosted tungsten resources in the Northern Rocky Mountain region of eastern Idaho and western Montana. This region has seen moderate tungsten trioxide (WO3) production in the past from a variety of mineralization styles including skarn, vein and replacement, and wolframite-quartz veins. The geology of the area is dominated by large plutons of Cretaceous to Tertiary age, emplaced into a belt of sedimentary rock ranging from Mesoproterozoic to Permian age, and affected by tectonism related to the Sevier and later Laramide orogenies. Known tungsten (W) skarn mineral sites are associated with...
Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Ashton, Bald Mountain, Beaverhead County, Bitterroot Range, Boise County, All tags...
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Tertiary sandstone capping divide. Sec. 20, T. 20 N., R. 24 W., 9 miles south of Gage. Ellis County, Oklahoma. September 17, 1918.
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View of Tertiary beds in Saratoga niter hills, south of Owl Holes-Silver Lake-Death Valley road junction, probably in sec. 9, T. 18 N., R. 5 E., 35 miles northwest of Silver Lake. Gravels on terrace in foreground have been washed from above Tertiary beds. Probably same area as shown on p. 23, California Mining Bureau Bull. No. 24, then considered to be a lake beach, Crucero Quadrangle. San Bernardino County, California. January 19, 1917.
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Tertiary sandstones in Cajon Canyon, looking northwest from same general locality as in 611. San Bernardino County, California. May 1921.


    map background search result map search result map View of Tertiary beds. San Bernardino County, California. 1917. Tertiary sandstone capping divide. Ellis County, Oklahoma. 1918. Tertiary sandstones in Cajon Canyon. San Bernardino County, California. 1921. Spatial data associated with tungsten skarn resource assessment of the Northern Rocky Mountains, Montana and Idaho Powder River Basin boundary, 1999 Coal Resource Assessment (prbbndg.shp) Wyodak-Anderson net coal thickness in the Sheridan coalfield, Wyoming (shrcatg) Tertiary-aged coal beds in the Sheridan coalfield, Wyoming (shrcbg) Wyodak-Anderson coal zone study limit in the Powder River Basin, Wyoming and Montana (wabndg.shp) Tertiary-aged coal beds in the Sheridan coalfield, Wyoming (shrcbg) Wyodak-Anderson net coal thickness in the Sheridan coalfield, Wyoming (shrcatg) Tertiary sandstone capping divide. Ellis County, Oklahoma. 1918. Wyodak-Anderson coal zone study limit in the Powder River Basin, Wyoming and Montana (wabndg.shp) View of Tertiary beds. San Bernardino County, California. 1917. Tertiary sandstones in Cajon Canyon. San Bernardino County, California. 1921. Powder River Basin boundary, 1999 Coal Resource Assessment (prbbndg.shp) Spatial data associated with tungsten skarn resource assessment of the Northern Rocky Mountains, Montana and Idaho