The Cow occurrence is located on the Cow 14 claim, south of the junction of the Chemainus River and Zizac Creek. The showing has been explored in conjunction with the Pogo (MINFILE 092C 074) occurrence.

The area is underlain by Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Lake Group) cherty argillite and by Upper Devonian McLauglin Ridge Formation (Sicker Group) volcaniclastics. These rocks are intruded by granodiorite and quartz diorite of the Early to Middle Jurassic Island Plutonic Suite and Triassic gabbro (informally called the Mount Hall gabbro).

Locally, the area of the main quartz carbonate vein is underlain by pyroclastic and sedimentary rocks of the McLaughlin Ridge Formation adjacent to a gabbro dike (130 metres to the east). The rocks trend west-northwest, are tightly folded and contain 3 to 5 per cent pyrrhotite. The vein occurs in an east trending shear zone, several metres wide, in silty, sandy and lapilli tuffs. The vein, exposed along strike for 20 metres, strikes 94 to 100 degrees and dips 85 degrees south. The vein is 5 to 20 centimetres wide and is well mineralized with pyrite (2 to 10 per cent) and lesser amounts of pyrrhotite, galena and sphalerite (up to 3 per cent) and chalcopyrite.

In 1964, E. M. Wilson staked the original Pogo 1-4 claims and completed a program of geological mapping, prospecting and geochemical sampling. From 1985 through 1987, JBL Resources completed programs of geological mapping, prospecting, geochemical sampling, ground geophysical surveys and two diamond drill holes, totalling 99.5 metres, on the area as the Cow 12-16 claims. In 1986, a sample (#14024) of vein material assayed 13.03 grams per tonne gold, 29.4 grams per tonne silver, 0.55 per cent lead and 0.238 per cent zinc over 5 centimetres (Assessment Report 16097).