The EK 78910 showing is located near the headwaters of Whitewater Creek, approximately 2.75 kilometres southwest of Whitewater Mountain. New Denver, British Columbia lies some 19 kilometres to the southwest.

The main lithologies of the area are assigned to the Permian Kaslo Group, consisting of andesite flows and pyroclastics (greenstone), and tuffaceous sediments. Volcanics are extensively chlorite altered and schistose. Sediments and volcanics have been locally intruded by diorite and feldspar porphyry dikes and sills. Serpentinite is the most extensive rock type exposed in this area, forming northwesterly trending bands with steep southwest dips and extending up to 750 metres in width. Talc and asbestos are common alteration minerals associated with this serpentinite unit. The contact between the serpentinite and surrounding lithologies is faulted. The surface trace of this fault can be traced for several kilometres. Underground this fault is marked by a heavy talc gouge.

The showing is underlain by sheared, argillaceous quartzite of the Triassic Slocan Group. A collapsed shaft at the intersection of the EK 7, 8, 9 and 10 claims is reported to be 20 metres deep. Seventy-one centimetres of "pay ore" is reported consisting of 46 centimetres of intermixed galena, tetrahedrite, sternbergite and silver chloride and 25 centimetres of carbonates. The galena yielded assay values of 2580 grams per tonne silver and 78 per cent lead to 6322 grams per tonne silver and 74 per cent lead (Assessment Report 3227). Carbonates yielded 992 to 3402 grams per tonne silver (Assessment Report 3227).