The Sal A showing is located at 2330 metres elevation above sea level, at the headwaters of Salisbury Creek in the Slocan Mining Division.

Regionally, the area lies within the Kootenay Arc near the margins of the Ancestral North American Terrane. The Kootenay Arc is a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic Horsethief Creek Group, the Eocambrian Hamill Group, the Lower Cambrian Badshot Formation, and the lower Paleozoic Lardeau Group. The volcano-sedimentary sequence is intruded by numerous Ordovician, Devonian and Mississippian granitoid plutons. The rocks have undergone regional metamorphism to middle or upper greenschist facies (Paper 1993-1).

The occurrence is on the eastern limb of the Duncan anticline within dolomite and limestone of the Lower Cambrian Badshot Formation which forms a narrow complexly folded band that separates micaceous quartzite of the Mohican Formation (Hamill Group) to the east from the phyllites of the Lardeau Group to the west. On the property, the Badshot Formation is overturned, strikes northwest and dips 60 to 70 degrees southwest. Lineations in the rocks plunge to the north 5 to 10 degrees, and it is presumed that the long axis of the mineralized zones are parallel to this plunge (Bulletin 49).

Mineralization consists of bands of fine to medium grained disseminated pyrite with minor sphalerite and galena with white crystalline calcite separated by barren grey dolomite. One mineralized zone is at the contact between dolomite and siliceous dolomite and can be followed for 100 metres along strike. The zone has a maximum thickness of 6 metres. Quartz veinlets near the mineralized zone locally contain medium-grained galena (Bulletin 49).