The area is underlain by probable Lower to Middle Paleozoic metasediments and metavolcanics of the Lardeau Group. The rocks consist of intercalated micaceous quartzite, sericite-quartz schist, chlorite-sericite schist, chlorite schist, greenstone, and limestone. A strong regional foliation strikes southeast and dips variably to the northeast.

Narrow discordant quartz veins carrying minor galena and chalcopyrite occur within chlorite schist. Two of the better mineralized veins carried silver values as well. The vein set rarely exceeds 0.5 metres in width and strikes north with steep westerly dips.