Narrow zones of metasediments, composed of limestone, quartzite and argillite occur in a wide belt of metavolcanics composed of tuffs and greenstones. The rocks are from an unnamed Paleozoic-Mesozoic formation which trends northwest and are intruded by Cretaceous to Tertiary diorite stocks and dykes of the Coast Plutonic Complex.

Sphalerite and chalcopyrite occur in skarn zones within the metavolcanics. A rock chip sample assayed 7.0 per cent zinc, 0.26 per cent copper and 2.0 grams per tonne silver (Assessment Report 13051).