The area lies within the Shuswap Metamorphic Complex along the northwest 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 mantled by an uncon- formably overlying succession of metasedimentary rocks. The meta- sediments comprise calc-silicate gneiss, sillimanite/kyanite schist, biotite gneiss quartzite and amphibolite.

Kyanite is well developed around a big west trending fold between Seymour River and Kirbyville Creek where considerable areas of amphibolite and amphibolite gneiss are intimately associated with quartzite.