The Rhyolite showing is located near the headwaters of Cronin Creek, about 2 kilometres south of the Cronin mine (093l 127) and 1.5 kilometres northwest of the Lorraine prospect (093L 129).

The showing was discovered in 1987 during regional mapping by the B.C. Geological Survey Branch. In 1991, the showing was re-examined during mineral potential studies in the area by the B.C. Geological Survey Branch.

The area is underlain by sediments of the Middle to Upper Jurassic Ashman Formation (Bowser Lake Group) intruded by rhyolite dikes.

The showing consists of sulphide veins and stockworks within and adjacent to rhyolite dikes that cut black argillite. The sulphides consist mainly of pyrrhotite and pyrite, with lesser arsenopyrite, chalcopyrite and specularite, minor sphalerite and microscopic native gold. Sulphides form massive banded veins up to 15 centimetres wide that are spatially associated with rhyolite. Disseminations and stockworks of sulphides occur within rhyolite. The mineralization is exposed over an area of approximately 25 square metres.

Samples of sulphide veins assayed up to 13.2 grams per tonne gold and 86 grams per tonne silver with appreciable zinc and copper values (Fieldwork 1991, p. 98).

The mineralization at the Lorraine prospect and the Cronin mine is closely associated with rhyolite intrusions. The Rhyolite veins are different mineralogically and texturally and are possibly manto-style veins.