The Pinaus East showing is located 9 kilometres south of Falkland, south of Pinaus Lake.
In this area, Upper Triassic to Lower Jurassic Nicola Group sedimentary and volcanic rocks unconformably overlie sedimentary and volcanic rocks of the Devonian to Triassic Harper Ranch Group. These units are intruded by Middle Jurassic granitic rocks. Extensive Eocene Kamloops Group volcanic and sedimentary rocks overlie the older units.
The showing comprises jasper and agate hosted in Kamloops Group basalt flows.