The Goodenough A showing is located 14 kilometres west-northwest of Vernon, north of Naswhito Creek.

In this area, sedimentary and volcanic 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. Eocene Penticton Group volcanic rocks overlie the igneous and sedimentary rocks.

Altered volcaniclastic rocks of the Harper Ranch Group host copper mineralization. A 1.5-metre thick lens of massive pyrite and pyrrhotite with disseminated chalcopyrite blebs is associated with a calc-silicate skarn.

In 1963-64, Empire Development Co. Ltd. conducted geological mapping, soil geochemistry, magnetometer and self-potential surveys and drilling programs. In 1969-75, Hudson Bay Exploration and Development Co. Ltd. carried out an induced polarization survey and drilling. In 1977-78, Cominco Ltd. carried out geological mapping and magnetometer and induced polarization surveys. In 1985-88, Brican Resources Ltd. conducted trenching and drilling programs.