In this area the geology from northeast to southwest, consists of northwest trending Karmutsen Formation andesites and minor lime- stone, Quatsino Formation limestone, both of the Upper Triassic Vancouver Group and Lower Jurassic Bonanza Group shales. To the south this succession is in fault contact with the Karmutsen Formation.

In the southern block of the Karmutsen Formation, close to the contact with the Bonanza Group, there is a showing of native copper (Assessment Report 1719).