At the Frisco showing three test pits on the southwest side of Schulz Creek, just below its junction with an east-flowing tributary, expose skarn in argillite and marble of Devonian to Upper Triassic age. Arsenopyrite, pyrite, bornite, sphalerite, and galena occur in diopside-serpentine-garnet skarn developed below the hangingwall argillite in six small en echelon lenses of white (bleached) quartz-rich metasediments. A quartz-feldspar porphyry dike is adjacent to the lower two lenses. Three samples ranged from 1.37 to 34.29 grams per tonne silver, and 0.03 to 0.07 per cent copper. A grab sample (Fieldwork 1992, page 220) assayed 17.7 per cent zinc.