The Mission Hill West showing is located 8 kilometres south- southwest of Vernon, west of Kalamalka Lake.
In this area, west of the Okanagan Valley fault zone, volcanic and sedimentary rocks of the Devonian to Triassic Harper Ranch Group are unconformably overlain by Upper Triassic to Lower Jurassic Nicola Group sedimentary and volcanic rocks. These units are intruded by Middle Jurassic granitic rocks of the informally named Terrace Creek batholith. Granitic Coryell rocks of Eocene age intrude the Paleozoic and Mesozoic rocks. Patches of Eocene Penticton Group volcanic rocks overlie the older rocks.
A quartz vein in quartz diorite hosts silver, lead and gold mineralization. A 2-metre thick quartz vein carries sparse disseminations of pyrite and galena. The vein strikes at 125 degrees azimuth and dips 60 degrees to the northeast.