This showing is on the north slope of Kennedy Mountain, about 12 kilometres southwest of Princeton.
The area between Whipsaw Creek and the Similkameen River is underlain by calcareous siltstone and sandstone, conglomerate, massive and pillowed andesite, andesitic tuff and volcanic breccia of the Upper Triassic Nicola Group. These rocks strike roughly north and dip 25 to 55 degrees west. They are cut by feldspar porphyritic dykes, possibly related to the Early Jurassic Lost Horse Intrusions, striking 025 to 050 degrees. These dykes are seldom over 7.6 metres wide.
Copper mineralization occurs in several zones of brecciation in the volcanics. These breccia zones are usually developed along the contacts of the feldspar porphyritic dykes. Mineralization consists of bornite and chalcopyrite in a gangue of calcite and minor quartz. One of these breccia zones has been exposed by trenching near Kennedy Lake. This zone is 30 metres long and 3 to 4.5 metres wide.
The various mineralized breccia zones were first prospected some time previous to 1947.