The Jake showing is located 5 kilometres northeast of the north end of Hatchery Arm, Babine Lake.
The area is underlain by reddish andesitic to rhyolitic flows and tuffs interbedded with subaerial tuffaceous mudstones. These belong to the Jurassic Saddle Hill volcanics, an informal subdivision of the Hazelton Group (Geological Survey of Canada Open File Map 2322).
Minor pyrite, chalcopyrite and malachite occur in fractures in stratified volcanic rocks (Minister of Mines Annual Report 1968, page 131).