The property occurs within the Central Quesnel Belt of the Quesnellia terrane, underlain dominantly by volcanic and sedimentary rocks of the Upper Triassic-Lower Jurassic Nicola Group. In the 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 while to the west rocks of the Nicola Group are in fault contact with the Cache Creek Group. Middle Jurassic sedimentary rocks overlie both Cache Creek Group rocks and rocks of the Nicola Group along parts of this western contact.

Immediately beneath breccias containing felsic clasts and over- lying maroon basalt is a limestone unit which occurs discontinuously along the Central Quesnel Belt. This unit marks the top of the Triassic assemblage in the region, the overlying rocks being of Lower Jurassic age. The limestone commonly hosts minor amounts of copper mineralization. The BI and Lynda claims are underlain by this lime- stone unit as well as the underlying maroon basalt unit. The lime- stone contains minor, finely disseminated tetrahedrite and chalcocite along thin bedding planes as well as malachite on weathered surfaces. The basalts immediately to the west also contain minor amounts of copper mineralization. These rocks are cut by a fault zone with associated calcite veinlets containing argentiferous tetrahedrite and minor malachite.