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

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

Geologic and geochemical map of Jerry Peak West and Boulder Creek Wilderness Study Areas, Custer County, Idaho 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 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 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 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 Geologic map and cross sections of the Carbondale 30' x 60' quadrangle, west-central Colorado

No abstract available.

Geologic map and cross sections of the Italian Peak and Italian Peak Middle Roadless Areas, Beaverhead County, Montana, and Clark and Lemhi counties, Idaho Geologic map and cross sections of the Italian Peak and Italian Peak Middle Roadless Areas, Beaverhead County, Montana, and Clark and Lemhi counties, Idaho

No abstract available.

Geologic map and cross sections of the Mora River area, Sangre de Cristo Mountains, Mora County, New Mexico Geologic map and cross sections of the Mora River area, Sangre de Cristo Mountains, Mora County, New Mexico

No abstract available.

Geologic map and cross sections of the San Joaquin Valley, California Geologic map and cross sections of the San Joaquin Valley, California

No abstract available.

Geologic map of part of the Orleans Mountain Roadless Area, Siskiyou and Trinity counties, California Geologic map of part of the Orleans Mountain Roadless Area, Siskiyou and Trinity counties, California

No abstract available.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Minerals, Energy, and Geophysics Science Center

Geologic map of the Adams Gap and Shinbone Creek Roadless Areas, Clay County, Alabama Geologic map of the Adams Gap and Shinbone Creek Roadless Areas, Clay County, Alabama

No abstract available.
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