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Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. 

Filter Total Items: 9000

Geochemical maps of the Gallatin Divide Roadless Area, Gallatin and Park counties, Montana

No abstract available.

Geochemical maps of the Moses and Dennison Peak Roadless Areas, Tulare County, California

No abstract available.

Geochemical maps of the Wonder Mountain Roadless Area, Mason County, Washington

No abstract available.

Geochemical survey of the Adams Gap and Shinbone Creek Roadless Areas, Clay County, Alabama

The U.S. Geological Survey (USGS) made a reconnaissance geochemical survey of the Adams Gap and Shinbone Creek Roadless Areas (fig. 1) to test for unidentified, indistinct, or unexposed mineral deposits that might be recognized by their geochemical halos or patterns formed by the distribution of trace elements. Similar geochemical surveys based on trace element analyses have been credited with the

Geochemical survey of the Cheat Mountain Roadless Area, Randolph County, West Virginia

No abstract available.

Geochemical survey of the Lusk Creek Roadless Area, Pope County, Illinois

The Lusk Creek Roadless Area (Index map) lies along the western edge of the Illinois-Kentucky fluorspar district in which flourite deposits occur as lenticular-type veins emplaced along fult zones or as tratiform-shaped bedding-replacement deposits that occur along fault zones (Grogan and Bradbury, 1967; Trace, 1974). Although mineralogy varies between deposits, Trace (1974) points out that the pr

Geochronometric and lead isotope data on samples from the Wallace 1 degree by 2 degrees Quadrangle, Montana and Idaho

Most of the bedrock in the Wallace quadrangle belongs to the Belt Supergroup, a thick (about 18,000 m) sequence of generally fine-grained clastic and carbonate rocks of Middle Proterozoic age.  Regional metamorphism prior to Cambrian time prograded the Belt rocks to greenschist facies, and some metal-bearing veins were emplaced in fractures.  The Belt rocks were intruded in Late Proterozoic time b

Geologic and geochemical map of Jerry Peak West and Boulder Creek Wilderness Study Areas, Custer County, Idaho

No abstract available.

Geologic and mineral resource potential map of the Service Creek Roadless Area, Routt County, Colorado

No abstract available.

Geologic map and coal sections of the Sawmill Mountain Quadrangle, Rio Blanco County, Colorado

No abstract available.

Geologic map and coal sections of the Thornburgh Quadrangle, Moffat and Rio Blanco counties, Colorado

No abstract available.

Geologic map and cross sections of the Carbondale 30' x 60' quadrangle, west-central Colorado

No abstract available.