The Lytton Bar showing is located in the Lytton Bar black sands on the west side of the Fraser River, 1.6 kilometres north of the Fraser and Thompson rivers confluence.
The black sands are radioactive. A concentrate assayed 0.16 per cent equivalent uranium oxide (Minister of Mines Annual Report 1948). Uraninite is the likely source of radioactivity (Geological Survey of Canada Economic Geology 16).