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Fact Sheet 2006–3072

Copper-Silver Deposits of the Revett Formation, Montana and Idaho—Origin and Resource Potential

By Thomas P. Frost and Michael L. Zientek

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The Revett Formation of northern Idaho and western Montana contains major stratabound copper-silver deposits near Troy, Rock Creek, and Rock Lake, Montana. To help the U.S. Forest Service (USFS) meet its goal of integrating geoscience information into the land-planning process, U.S. Geological Survey (USGS) scientists recently completed a compilation of regional stratigraphy and mineralogy of the Revett Formation and a mineralresource assessment of Revett-type copper-silver deposits. The USGS assessment indicates that a large area of USFS-administered land in northwestern Montana and northern Idaho may contain significant undiscovered Revett-type copper-silver deposits.

First posted May 23, 2006

This publication is online only

For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591

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Suggested citation:

Frost, T.P., and Zientek, M.L., 2006, Copper-silver deposits of the Revett Formation, Montana and Idaho—Origin and resource potential: U.S. Geological Survey Fact Sheet 2006–3072, 2 p.,

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