The Sta-Tite radioactive occurrence is located on the west side of Upper Arrow Lake, approximately 10 kilometres southwest of Nakusp.
The area is underlain by schist and gneiss of the Precambrian- Paleozoic Shuswap Metamorphic Complex (Geological Survey of Canada Open File 464). Radioactive pegmatite within these rocks contains values of uranium and thorium. A 20-centimetre sample assayed 0.008 per cent uranium and 0.14 per cent thorium oxide (Minister of Mines Annual Report 1954).