The Shadow Ridge area is underlain by rocks of Upper Proterozoic Shuswap Metamorphic Complex consisting of schist and gneiss, and volcanic and sedimentary rocks of the Eocene Penticton Group. The country rock is capped by massive, olivine-basalt of the Miocene and Pliocene Chilcotin Group.
Kettle Valley Stone Company produces multi-coloured decorative rock, ashlar and facing rock from Chilcotin columnar basalt.