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Reconnaissance geochemical map of the Mount Henry Roadless Area, Lincoln County, Montana
D. F. Siems, R. W. Leinz, R. E. Van Loenen, G.A. Wadsworth, C. M. McDougal
1984, Miscellaneous Field Studies Map 1534-B
A geochemical survey was conducted in the Mount Henry Roadless Area, Kootenai National Forest, Lincoln County, Mont. by the U.S. Geological Survey during the summer of 1981. The sampling and analytical programs were designed to locate mineralized zones in outcrops or in rocks buried at shallow depth. The geochemical results should...
Maps showing geomorphic and geologic evidence for Late Quaternary displacement along the Surprise Valley and associated faults, Modoc County, California
Charles W. Hedel
1984, Miscellaneous Field Studies Map 1429
The maps in this report are designed to show the location, nature, and age of fault traces and lineaments that are interpreted to be the result of late Quaternary movement along the Surprise Valley and associated faults. These characteristics are important to scientists and engineers who study the surface faulting...
Geochronometric and lead isotope data on samples from the Wallace 1 degree by 2 degrees Quadrangle, Montana and Idaho
R. F. Marvin, R. E. Zartman, J. D. Obradovich, J. E. Harrison
1984, Miscellaneous Field Studies Map 1354-G
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...