The Hadrynian and/or Paleozoic Silver Creek Formation (Mount Ida Group), a sequence of highly deformed, moderately metamorphosed rocks comprised of micaceous schist and quartzite, is intruded by Cretaceous? granodiorite and pegmatite equivalents. These rocks are locally overlain by conglomerates, which are overlain by andesitic and basaltic flows, all of the Eocene Kamloops Group. A strong north-northeast lineation cuts the rocks.

A geochemical anomaly occurs over the granodiorite and linear trend. A sample assayed 0.054 per cent uranium by hot nitric acid extraction and 0.045 per cent uranium by neutron activation. The value is supported with a 20,000 counts per minute reading on a McPhar TV-1A spectrometer. Background is 6000 counts per minute (Assessment Report 7319).