The claims are underlain by Middle Jurassic Bowser assemblage greywackes, siltstones, and minor intercalated limestone and chert pebble conglomerate of the Salmon River Formation, unconformably overlying volcanic conglomerate, sandstone and minor breccia of the Betty Creek Formation. The Salmon River sedimentary rocks are found at lower elevations on the west side of the property and the Betty Creek volcaniclastics form the crest of Bear River Ridge (Mt. Bunting) on the east side of the property. An augite diorite intrusive stock of Eocene age, similar in appearance to the Glacier Creek pluton 20 kilometres to the south- east, occurs in the northwest corner of the Gala 1 claim. The Portland Canal dyke swarm crosscuts the southern half of the claims. Granite, quartz monzonite, granodiorite and quartz diorite dykes of a few metres to 100 metres thick and up to 1000 metres long trend across the property in a northwest direction.