The property lies on the eastern flank of the Lower Jurassic Guichon Creek batholith. The area is underlain primarily by Highland Valley phase (Chataway) medium-grained hornblende-biotite granodiorite intruded by Bethlehem phase porphyritic dyke swarms. The rocks are highly fractured and altered.

The Malachite Hill showing consists of granodiorite boulders and outcrop over a small area. Malachite occurs as thin fracture coatings in the granodiorite and as staining in the overburden.