This occurrence represents a color anomaly which is approximately 1,500 by 200 feet (Christie, 1974). Rocks at this site include andesite, vescicular andesite, feldspar porphyry, basalt, tuff, and conglomerate. The volcanic rocks are of probable Tertiary age (Christie, 1974; Simpson, 1985). The primary feldspars have been partially altered to clay and epidote. Strong gossan occurs along the north shore of the southwest arm at Trident Bay. Extensions of this gossan may be covered by the conglomerate. A weak gossan is present along the south shore of this arm of the bay. The altered rocks contain 1 to 4 percent pyrite, with only a minor amount of which occurs as fracture fillings.