The AB showing is located within the Central Quesnel Belt of the Quesnellia Terrane, underlain dominantly by volcanic and sedimentary rocks of the Upper Triassic to Lower Jurassic Nicola Group. In this region the Nicola Group consists of a lower sedimentary succession overlain by green and grey basalt, in turn overlain by maroon basalt and breccias characterized by the presence of felsic clasts. The contact with the Omineca Belt to the east is a thrust fault and to the west rocks of the Nicola Group are in fault contact with the Cache Creek Group. Middle Jurassic sedimentary rocks overlie both the Cache Creek Group and the Nicola Group along parts of the western contact.

Little geological information is available in this largely over- burden covered area. However, recent mapping suggests that the show- ing is underlain by sedimentary rocks and basaltic volcanics of the lower part of the Nicola Group stratigraphy. Ubiquitous pyrite and minor galena and tetrahedrite are reported at this locality.