At the International showing, a 1.2-metre wide, southwest- trending vein occurs in andesitic tuffs and breccia of the Miocene and Pliocene Skagit Formation. Permian to Jurassic Hozameen Complex volcanic rocks are in contact with the Skagit Formation in this vicinity and underlie much of the territory to the north.

Massive galena, pyrite, and chalcopyrite occur in the vein. A 0.5-metre sample assayed 38.6 per cent lead, 4 per cent copper, 4.8 grams per tonne gold and 617 grams per tonne silver (Minister of Mines Annual Report 1929). Carnotite is also reported to occur in the vein.