USGS Geologist approaches an old exploration trench

Geologist George Case approaches an old exploration trench exposing stratiform Ag-Sn-Pb-Zn mineralization in the Groundhog Basin deposit area. Geologists are conduction field work on East flank of Marsha Peak in the Stikine River corridor on the Transboundary Waters Project. The purpose of this work is to understand the geochemistry, mineralization, and distribution of the rocks that contribute to the chemistry of streams in the Stikine River corridor.