A band of Mesozoic and/or Paleozoic metasedimentary and meta- volcanic rocks, trending north and dipping 45 degrees east, is surrounded by intrusive rocks of the Coast Plutonic Complex. To the west, the metasediments are thrust on top of younger granodiorite and to the east, the succession is invaded by thick dioritic to gabbroic sills. The metasedimentary rocks consist of cherts, siltstones and phyllites with lenses of graphitic shales.

Mineralization consists of disseminated pyrite, pyrrhotite, chalcopyrite, and sphalerite within the black graphitic phyllitic shales. A grab sample assayed 0.64 per cent zinc and 1.8 grams per tonne gold (Assessment Report 12777).