Grey-green andesites and agglomerates of the Jurassic Hazelton Group are intruded by a granite plug to the south. The agglomerates are interbedded with andesitic tuffs which dip 40 to 60 degrees south-southwest. Several faults cut the rocks.

Patches of chalcopyrite occur in epidotized agglomerates over widths less than 30 centimetres. A 10 centimetre sample assayed 0.92 per cent copper, 10.3 grams per tonne silver and 0.7 grams per tonne gold (Assessment Report 2394).