The Wallace and Copper Hill claims are situated north of the Koksilah River, near Humes Creek.

The area is underlain by the Sediment-Sill Unit, formerly of the Paleozoic Sicker Group. The unit is generally correlative with the Mississippian to Pennsylvanian Fourth Lake Formation of the new Buttle Lake Group. This is overlain locally by limestone, bedded chert and cherty tuff of the Upper Pennsylvanian to Lower Permian Mount Mark Formation, Buttle Lake Group (formerly the Buttle Lake Formation). A granodioritic stock of the Early to Middle Jurassic Island Plutonic Suite (formerly known as Island Intrusions) disrupts the regional stratigraphy.

Locally, copper mineralization is reported to be found at the contacts of chert and granodiorite.

In 1983 through 1985, Reward Resources completed programs of prospecting, geochemical sampling and ground geophysical surveys on the Independence, Koksilah, Pacific Star and Western mineral claims.