The claims are underlain by Lower Jurassic Hazelton Group, Telkwa Formation rocks comprised of andesitic tuff and breccia with interbedded argillite, greywacke and shale. The volcanics are intruded by an Eocene Babine Intrusive which consists of a northeast extension of a biotite-feldspar porphyry dike. This dike occurs in the southern part of the Granisle Copper Ltd. property. The interbedded argillites and greywackes strike north and dip to the west at moderate angles.

Locally, a 0.3 metre wide calcite vein containing disseminated galena and sphalerite with minor chalcopyrite and pyrite follows a west trending shear zone. Disseminated pyrite, accompanied by iron staining, occurs in the argillites and greywackes adjacent to the shear zone.