An isolated knob, 1 kilometre north of Oregon Jack Creek, rises about 25 metres above the surroundings. It consists of a massive white to light brown coloured rock made up primarily of siderite with lesser amounts of quartz. Small areas carry 1 to 3 per cent chalcopyrite which has been partially altered to malachite which produces irregular blue bands throughout the rock. The siderite-quartz body is surrounded by altered limestone that is part of a melange unit in the Carboniferous to Jurassic Cache Creek Complex. The siderite-quartz body is approximately circular in plan.

Copper mineralization is also found about 1250 metres south-southwest of the siderite-quartz body. Minor malachite, bornite and chalcopyrite occurs as fine-grained disseminations along multiple fracture surfaces in limonitic argillite and fine-grained volcaniclastics. One sample yielded a high of 0.1 per cent copper and 25.7 grams per tonne silver (Assessment Report 13322).