The Great Western showing is a mineralized quartz-siderite vein within thin bedded argillites and siltstones of the Helikian Aldridge Formation (Purcell Supergroup). A 20-metre adit was drive at 1372 metres elevation, east of and immediately above Little Sand Creek. The vein strikes approximately east and has a near vertical dip. The quartz gangue carries lead, zinc and iron sulphides which carry minor gold and silver values. A sample taken across 45 centimetres at the face of the adit assayed up to 5.9 per cent lead, 6.6 per cent zinc, 0.21 per cent copper, 59.1 grams per tonne silver, and 0.31 gram per tonne gold (Minister of Mines Annual Report 1926, page 244).

A 1982 report documented 6 diamond-drill holes being completed on the Cedar 8 and 10 claims of the R.H. Stanfield property in 1979 and 1980 totalling 5997 metres: 1-79, 2-79, 3-79, 4-79, 5-79 and 2-80 (Assessment Report 10304). The Cedar 8 and 10 claims were centrally located on the property with holes 4 and 5 located near the access road up #4 Mountain and the adit tunnel on the G zone, located about 3 kilometres southeast of the Great Western occurrence. Holes 1, 2 and 3 were a short distance up Little Sand Creek on a branch road. The 6 drill holes were thought to have penetrated upper and probably middle Aldridge strata. All rock types were reported to contain disseminations, fracture fillings, very thin strata stringers, quartz veins and quartz siderite veins carrying pyrite and pyrrhotite along with minor chalcopyrite and limited blebs of galena. The mineralization was examined megascopically but no sections were taken for sampling.

In 1988, 10 drill Holes (C3-88, C8-G-1-88, D1-1-88, D2-2-88, D10-1, D10-2, D10-PP1, D10-PP2) totalling 544.8 metres, were completed on the Cedar 1A, Cedar 3A, Dogwood 1A, Dogwood 4 Groups for R.H. Stanfield (Assessment Report 19034). A vertical rotary hole was drilled on the Cedar 3 claim in 1988 and one hole was drilled on the Cedar 8 claim in 1988.

A 1997 exploration report for Gallowai Resources and the R.H. Standfield Group summarizes the Great Western showing as, "A strongly mineralized vein on the northwesterly flank of Mountain No. 5 at an elevation of 1280 metres above sea level in the Lizard Range has provided a surface sample assaying 6.85 per cent lead, 303 grams per tonne silver grams per tonne silver, and trace gold. The vein exposed through a 30-metre adit strikes into the mountain at south 85 degrees east, dipping towards the south within a host rock of argillaceous quartzite of the Aldridge Formation" (PFD 676699, page 26). The measured strike and dip of the Great Western host structure was reported to tie it in with the Viking showing (082GSW056) on the opposite side of the valley.

Refer to Bull River (082GNW002) for details of the greater Bull River property which contained 25 MINFILE documented mineral occurrences as of September 2022.