The showings lie southeast of Crystal Butte, about 3 kilometres east of Wallace Mountain. Access is along Beaverdell Creek Road and then Crystal Lake Road.

The showings were first staked as the Crystal Butte in 1925 by F. Carey and W.R. Lawrence. In 1926, claims on the showings included Little Joe, Rainbow and Sullivan. Development work at the time included shafts and adits. The workings focused on quartz veins mineralized with galena, sphalerite, chalcopyrite, pyrite and arsenopyrite.

In 1980, R. Kregosky staked the showings as the H-K claims and relocated and sampled the old workings. In 1981, soil sampling, prospecting, geological mapping, and electomagnetic surveying were conducted on the claims. A 45-centimetre chip sample of a quartz vein located in an adit assayed 1.2 per cent zinc, 0.3 per cent lead, 0.04 per cent copper and 33.6 grams per tonne silver (Assessment Report 10470).

In 1987, the showings were restaked as the Volcano group by R. Hart and G. Houlind. In 1988, showings were sampled and magnetometer and geochemical surveys were conducted.

The Volcano showing area is underlain mainly by metasediments, limestone and mafic metavolcanics of the late Paleozoic Wallace Formation (Anarchist Group). These are intruded by a granodiorite stock of probable middle Jurassic age, and numerous north-trending porphyritic dikes. Crystal Butte, located immediately to the north is underlain by Eocene Marron Formation alkalic volcanics, which are unconformably overlain by basalt of the Miocene Kallis Formation. A north-trending, west-side-down normal fault is inferred to cut through the immediate area. The mineralized quartz veins occur in quartzites and fine-grained metasediments, and skarn is locally developed in limestone.