The Sootheran showing is on the south bank of the Tulameen River, 580 metres east-northeast of the mouth of Britton (Eagle) Creek and 10 kilometres west-southwest of the town of Tulameen.

A zone of quartz veining occurs in peridotite of the Early Jurassic Tulameen Ultramafic Complex, a zoned Alaskan-type intrusive complex. The showing is in the northern margin of the dunite-rich core of the complex. The zone strikes 010 degrees and dips steeply west. At one point, it is 1.8 metres wide, containing 0.6 metre of quartz and a 0.3-metre thick mass of country rock, in addition to some sheared and oxidized material .

The quartz is sparsely mineralized with pyrite, galena, chalcopyrite and sphalerite. Galena also occurs in a band, 10 centimetres thick, on the east wall of the zone. Three chip samples taken across the zone assayed traces of gold and a few grams per tonne silver; a sample of the galena band assayed trace gold and 21 grams per tonne silver (Property File - M.S. Hedley, 1937).