The Slide showing, within the Barkerville Terrane, is underlain by the Hardscrabble Mountain succession of the Upper Proterozoic-Paleozoic Snowshoe Group. The Pleasant Valley Thrust which separates the Barkerville Terrane from the Cariboo Terrane lies immediately to the east of the property. The showing is located 125 metres to the west of the Vic showing (093A 070), on the west bank of Cunningham Creek, about 17 kilometres southeast of Barkerville.
Lithologies underlying the showing are typical of the Hardscrabble Mountain succession, comprising graphitic shales, silty carbonate and greywacke. Mineralization consists of sphalerite, argentiferous galena and pyrite.
In 1977, a grab sample assayed 7.93 grams per tonne silver, 3.65 per cent zinc and 0.61 per cent lead (Assessment Report 6545). Recent drilling on the Nugget Mountain vein resulted in an assay of 34.623 grams per tonne gold and 25.024 grams per tonne silver across 3.1 metres (George Cross Newsletter #88, May 8, 1989).
Work in 1976 led to recognition of an 8-kilometre belt of shales, phyllites and limestones in the vicinity of Roundtop Mountain containing conformable bodies of galena, pyrite, sphalerite and barite. One hundred and forty-one claims known collectively as the Cunningham Creek Claims, were subsequently staked or optioned by Riocanex. In 1977, Riocanex conducted soil sampling and geophysical orientation traverses were carried out using both Maxmin and Double Dipole EM, Self Potential meter and magnetometer instruments. A backhoe was used to dig 1.6 kilometres of trenches across geochemical anomalies and sulphide showings, and two diamond-drill holes totalling 94 metres were directed at a coincident geochemical and geophysical anomaly. In 1978, Riocanex continued exploration with a programme that included 934.4 metres of diamond drilling in ten holes at the A Zone, the Vic-Beamish area, the X Anomaly and the Bralco showing; 2295 metres of backhoe trenching, most of which was directed at targets on the west flanks of Roundtop Mountain; 1200 metres of trenching with a D8 Caterpillar bulldozer at the A Zone; 3158 geochemical soil samples, and detailed geological mapping of the A Zone and trenches elsewhere.
