The area lies within the Shuswap Metamorphic Complex along the south margin of the Frenchman Cap Dome. The core of the dome is composed of a mixed paragneiss and orthogneiss succession of probable Aphebian age, and is unconformably overlain by a succession of metasedimentary rocks, which are intruded by a porhyritic granite gneiss.

Blocky, medium to coarse-grained granitic rocks contain widely scattered lenses of granitic pegmatite. The lenses are a few metres thick and several metres long and consist of medium to coarse-grained quartz and potash, commonly in large inter- grown crystals. Biotite, muscovite and rarely black tourmaline and brown garnet are present in crystals up to 4 centimetres across.