The Iron Cap showing is located 7 kilometres west of Vernon, north of the Vernon Arm of Okanagan Lake.

In this area, west of the Okanagan Valley fault zone, volcanic and sedimentary rocks of the Devonian to Triassic Harper Ranch Group are unconformably overlain by Upper Triassic to Lower Jurassic Nicola Group sedimentary and volcanic rocks. These units are intruded by Middle Jurassic granitic rocks informally named the Terrace Creek batholith. Patches of Penticton Group volcanic rocks overlie older rocks.

Quartz veins in Harper Ranch basalt host copper mineralization. Two narrow quartz veins, explored by shallow pits and a shallow shaft, occur about 600 metres northeast of the Densy adit (082LSW033). The veins, striking 120 degrees and dipping 75 degrees to the south, carry disseminated pyrite and chalcopyrite. The basalt appears to be iron-carbonate-sericite altered. The thickest vein is 94 centimetres and a sample (#3052) assayed 0.116 gram per tonne gold (Assessment Report 18983).

About 235 metres to the northwest of the above vein, 3 shallow pits appear to have explored a quartz vein hosted in quartzite.

By 1897, a 3 metre shaft had been sunk. The veins were sampled by G. Benvenuto in 1988.