The showing is located within the Cariboo Terrane of the Omineca Belt near the contact between the Hadrynian to Lower Paleozoic Cariboo Group and the Lower Devonian Black Stuart Formation. This contact is marked by a steeply dipping reverse fault with Black Stuart Group argillite, siltstone and chert in the footwall and Cariboo Group siltstone and limestone, possibly of the Dome Creek Formation, in the hanging wall.

Mineralization occurs as pockets within a tectonic breccia in the immediate footwall of the fault. The breccia contains 1-4 per cent fine-grained orange sphalerite with minor galena and barite occurring as disseminations in fine-grained white quartz and as rims on grey chert fragments. Thin sphalerite-galena-barite veinlets are also present cutting sedimentary chert breccia.