At this site quartz-sulfide veins and disseminated sulfides occur in an altered Tertiary plug exposed in a creek drainage. Pyrite, chalcopyrite, sphalerite, and molybdenite are present in quartz veins up to 6 centimeters in width. Metal values run to greater than 20,000 ppm copper, and up to 2000 ppm zinc, 200 ppm lead, 200 ppm silver, 200 ppm cobalt, 100 ppm molybdenite, and 1.1 ppm gold (Church and others, 1994, table 15). Bedrock in this general area consists of sedimentary units of the Kaguyak Formation (Late Cretaceous) and sill-like and crosscutting Tertiary intrusive bodies of tonalite and granodiorite.