The Seal (Pit C) occurrence is located on a small ridge or knoll north of Seal Creek, approximately 1.1 kilometres northeast of the creek’s junction with Big Sheep Creek.

The area is underlain by an east-trending belt of greenstones, tuffs, limestones and argillaceous sediments of the Carboniferous to Permian Mount Roberts Formation that have been intruded by a Middle Jurassic porphyritic granite and syenitic to monzonitic rocks of the Eocene Coryell Plutonic Suite.

Locally, a former 5-metre deep shaft exposes a quartz-veined skarn zone with disseminations, lenses and/or pods of sulphide (pyrite-chalcopyrite-galena) mineralization along the contact between a calcareous tuff, an epidotized argillite and a granitic intrusive. The granite also hosts quartz veins with blebs of molybdenite up to 2 centimetres in size.

In 1989, three rock samples (16A, 15A and 17A) yielded 2.30, 3.38 and 3.39 grams per tonne gold with 10.2, 5.2 and 5.0 grams per tonne silver, respectively (Assessment Report 19421).

In 1990, three samples (JD-1, JD-3 and JD-4) yielded from 2.24 to 6.72 grams per tonne gold with 3.0 to 10.1 grams per tonne silver, whereas another sample (JD-2) yielded 0.400 per cent molybdenum (Property File - Taff Resources Ltd. [1990-10-12]: Geological Evaluation of the Seal Claim Group).

The area has been explored since the early 1900s, with a shaft likely dating to this period.

During 1983 through 1986, Rex Silver Mines Ltd. conducted programs of rock and silt sampling, geological mapping and ground geophysical surveys on the area as the Joy 1-4 claims. During 1988 through 1990, Taff Resources Ltd. conducted programs of rock and soil sampling, geological mapping and a 23.6 line-kilometre ground electromagnetic (VLF) survey on the area as the Seal claims.

During 2003 through 2005, Kootenay Gold Inc. completed a program of geological mapping and prospecting on the area.