The Shorts Creek Agate showing is located 25 kilometres west- southwest of Vernon, north of Shorts Creek.
In this area, Devonian to Triassic sedimentary and volcanic rocks of the Harper Ranch Group are intruded by Middle Jurassic granitic rocks. Extensive Eocene Penticton Group volcanic and sedimentary rocks overlie the older units.
Penticton Group volcanic rocks host agates. Amygdules of agate were found along a logging road leading to the plateau north of Shorts Creek.