Plates 1. Map of the Revett Formation, western Montana and northern Idaho, showing the locations of mineralized strata, diamond-drill holes, and measured sections 2. Lithologic cross sections A-B and C-D, showing stratigraphic relations and mineral zones in the Revett Formation of western Montana and northern Idaho 3. Maps showing pyrite-calcite zones in the upper and lower members of the Revett Formation, western Montana and northern Idaho, untested exploration areas, and permissive tracts for the occurrence of undiscovered Revett-subtype stratabound copper-silver deposits 1. Map of western Montana and northern Idaho, showing the locations of the study area, major faults, and stratabound copper-silver deposits in the Revett Formation .

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