A stratabound siliceous and pyritic horizon, thought to be an exhalite, occurs within yellowish-white quartz sericite schist derived from rhyolitic to trachytic tuffs of the Devonian to Mississippian Eagle Bay Formation. These felsic volcanic rocks grade upward into a more intermediate rock or dacite and are underlain by argillites.

The siliceous horizon contains a 100 by 100 metre pyritic zone with minor disseminated chalcopyrite. A 1.0 metre chip sample assayed 0.127 per cent copper, 2.2 grams per tonne gold, and 7.5 grams per tonne silver (Assessment Report 13559).