This occurrence is located about 1.8 kilometres northeast of Sawyer Glacier. The area is underlain by rocks of the Lower Jurassic Unuk River Formation, Hazelton Group. The formation is composed primarily of thick-bedded epiclastic volcanic rocks and lithic tuffs with closely associated pillow lavas, carbonate lenses and thin-bedded siltstone. A small stock of Lower Jurassic and younger(?) syenite intrudes the country rock within 300 metres to the west of the occurrence.

Alteration and deformation in the area are complex and are related to regional folding and Jurassic and Tertiary plutonism. In addition, the degree of dynamic metamorphism increases toward the South Unuk River cataclasite zone (Grove, Bulletin 63).

Malachite and pyrrhotite are reported to occur near the southern margin of an icefield. Another malachite showing occurs about 1 kilometre to the south (Newmont Map).