The Rad occurrence area is underlain by Triassic Mount Lytton Complex dioritic intrusives and Lower-Middle Cretaceous Pasayten Group (correlative with the Spences Bridge Group) mafic volcanics, shales, arkose and conglomerate. Major faults lie along Botanie Creek and the Fraser River. Uranium mineralization occurs in sheared, hematitic sandstone adjacent to a shale unit and a granodiorite contact. A sample from the area assayed 0.038 per cent uranium (George Cross News Letter #107, 1976).