The Hillside occurrence is located west of Retallack and east of Jackson creek at 1190 metres elevation above sea level, in the Slocan Mining Division.
Regionally, the area lies on the western margin of the Kootenay Arc, in allochthonous rocks of the Quesnel Terrane. In the vicinity of the occurrence, the Quesnel Terrane is dominated by the Upper Triassic Slocan Group, a thick sequence of deformed and metamorphosed shale, argillite, siltstone, quartzite and minor limestone. Rocks of the Slocan Group are tightly and disharmonically folded. Early minor folds are tight to isoclinal with moderate east plunging, southeast inclined axial planes and younger folds are open, southwest plunging with subhorizontal axial planes. The sedimentary sequence has been regionally metamorphosed to lower greenschist facies.
South of the occurrence, the Slocan Group has been intruded by the Middle Jurassic Nelson intrusions which comprise at least six texturally and compositionally distinct phases ranging from diorite to lamprophyre. The most dominant phase is a medium to coarse grained potassium feldspar porphyritic granite. Several feldspar porphyritic granodiorite dikes, apparently related to the Nelson intrusions, also cut the sedimentary sequence near the occurrence (Paper 1989-5).
The property is underlain by thinly bedded calcareous argillite, shale and slate of the Slocan Group. Minor limestone and quartzite beds are also present. The sedimentary rocks strike northwest and dip southwest. A small granodiorite stock and several quartz porphyritic dikes cut the sedimentary sequence just west of the occurrence. The area is cut by east and northwest-trending faults.
On the Hillside property three small adits totalling about 180 metres explore a quartz vein that follows a northwest trending fault zone. The vein is narrow and dips southeast. Vein mineralogy is not know, but silver and copper were recovered from the occurrence in 1900.
Production from the vein yielded 13,654 grams of silver and 424 kilograms of copper from a total of 2 tonnes mined.
