The Cascade occurrence is located at the head of Cascade Creek at 1980 metres elevation above sea level, 2 kilometres north of Mount Marion in the Slocan Mining Division.

Regionally, the area lies within the Selkirk Mountains of southeastern British Columbia. The occurrence is within the Kootenay Arc, a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic Horsethief Creek Group, the Upper Proterozoic to Lower Cambrian Hamill Group, the Lower Cambrian Badshot Formation, and the Paleozoic Lardeau and Milford groups. The volcano-sedimentary sequence is intruded by numerous Paleozoic to Mesozoic granitoid plutons and has been metamorphosed to at least middle greenschist facies before the emplacement of the mineralization.

The rocks underlying the Cascade occurrence are thermally and regionally metamorphosed phyllite, argillite, limestone and quartzite of the Pennsylvanian Milford Group. A small granodiorite to quartz monzonite stock, approximately 1500 metres long by 500 metres wide, is exposed just west of the occurrence. The stock is probably a satellite intrusion of the larger Mesozoic Poplar Creek stock to the northwest.

Numerous dikes, sills and veins intrude the sedimentary rocks and in general are quite conformable with the foliation of the hostrocks. At least three types of dikes are recognized: fine grained, white aplite; grey to pink medium grained quartz monzonite; and light grey medium grained quartz diorite. Disseminated pyrite, galena and molybdenite are associated with the fine grained, white aplite dikes. Alteration associated with the mineralization includes secondary silica and sericitization. Geochemical sampling of two aplite dikes, 1 and 2 metres wide respectively, yielded up to 260 parts per million molybdenum (0.04 per cent MoS2) (Assessment Report 7838).