The Snowfields showing is located on the east side of the Granduc Road, approximately 1.0 kilometres east of Noname Lake.

The area is underlain by Lower Jurassic Hazelton Group, Unuk River Formation metavolcanics. The Hazelton Group is a northwest-trending, steeply east dipping belt of folded andesitic lapilli tuffs, flows and breccia containing a thick sequence of argillite and siltstone infolded along a synclinal axis. The sequence is intruded by Early Jurassic Texas Creek dacitic porphyry dikes.

Locally, mineralization is chalcopyrite with lesser sphalerite and galena in quartz-carbonate veins hosted by chlorite-altered equigranular granodiorite. At least three subparallel veins occur at the showing with individual veins up to about 0.50 metre in width. The veins strike from 158 to 190 degrees and dip 38 to 55 degrees west.

The Extreme Copper Zone was sampled in the Snowball area by Pinnacle Mines and Mountain Boy Minerals in 2004 in the Salmon River valley and along the Granduc road in 2005 (Assessment Report 29383). These companies operated the Silver Coin property containing mulitple showings. It has flat lying quartz-sulphide veins along the northwest striking, north dipping granodiorite dyke up to 25 meters wide. Quartz veins can be up to 1 meter in width with coarse, massive sulphide forming 50 per cent of the vein. Chalcopyrite is the most dominant sulphide with minor pyrite, tetrahedrite, sphalerite and galena. The zone extends from the Indi 9 claim across to the Indi 10 claim, a distance of at least 1 kilometer.

Between 1990 and 1992, Westmin Resources and Homestake Canada completed programs of soil sampling, geological mapping and prospecting. Grab sampling returned values up to 2.33 grams per tonne gold, 816 grams per tonne silver, 14.4 per cent copper, 0.52 per cent lead and 0.35 per cent zinc (Assessment Report 21810).

During 2004 through 2019, the area has been explored as part of the Silver Coin property and a complete property exploration history can be at the nearby Silver Coin (MINFILE 104B 150) occurrence.