Limestone is exposed along the base of a slope for 650 metres on the northeast side of the Necoslie River road, 13 kilometres south- east of Fort St. James. The deposit lies on the southwest margin of a belt of limestone of the Carboniferous to Jurassic Cache Creek Group with minor chert, argillite and greenstone (andesite) up to 10 kilometers wide that extends northwest of Gordon Lake for 200 kilo- metres.
The deposit is comprised mostly of light grey, medium to fine grained limestone that becomes black in a few places. The limestone is cut by white calcite veinlets and contains a few cherty inclus- ions. A sample of randomly collected chips taken along a roadcut for 38.1 metres assayed 51.66% CaO, 0.14% MgO, 6.42% insolubles, 0.29% R2O3, 0.12% Fe2O3, 0.06% MnO, 0.03% P2O5, 0.011% sulphur and 40.78% ignition loss (Geology, Exploration and Mining in B.C. 1969, p. 393).
This deposit was partially stripped and drilled by Domtar Chemicals between 1968 and 1970.