The X-14 showing is located on the slopes east of Cunningham Creek near the headwaters of Trehouse Creek, 1.25 kilometres west-southwest of Roundtop Mountain, about 19 kilometres southeast of Barkerville.

The showing consists of disseminated sphalerite and galena in black limestone. It was discovered in 1977 during a trenching program over a large lead-zinc soil geochemical anomaly. A grab sample by Riocanex assayed 0.31 per cent lead and 0.7 per cent zinc (Assessment Report 6545). At the same time, bedded barite was discovered in an adjacent trench to the northeast (part of Cunningham Creek barite occurrence, 093A 158). These occurrences, and several similar lead-zinc-barite occurrences nearby, are within a succession of mainly dark grey slates and limestones assigned to the Hardscrabble Mountain and Permian Bralco successions of the Upper Proterozoic-Paleozoic Snowshoe Group (Geological Survey of Canada Memoir 421; Open File 2004-12). These lead-zinc-barite occurrences may be sedimentary exhalite deposits (Fieldwork 1997, pages 13-6 - 13-7).

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.