The claims are underlain by Lower Jurassic Hazelton Group, Nilkitkwa Formation volcanics comprised mainly of andesite, andesitic flows, tuffs and breccia.

The Shamrock showing is a vein (in maroon andesite) ranging from 0.3 to 0.9 metres in width comprised of brecciated andesite and calcite. Mineralization consists of bornite, covellite and chalcocite with minor native copper. In 1922, a 0.6 metre sample of the vein material assayed 102.9 grams per tonne silver and 0.9 per cent copper (Minister of Mines Annual Report 1922, page 106).

The Lakeview showing is a mineralized shear zone averaging 1.5 metres in width, striking 045 degrees and dipping 69 degrees southeast. The quartz vein hosts bornite.