A wide band of limestone extends northeast from the mouth of the Koeye River for 1000 metres, outcropping mostly along its northwest bank, 9 kilometres south of Namu on the coast. The band is situated in an elongate roof pendant of schist and gneiss within granitic rocks of the Jurassic to Tertiary Coast Plutonic Complex. The limestone strikes 060 degrees and dips nearly vertical. The band is 122 metres wide near its northeast end.

The deposit is comprised of fine to coarse-grained, white to dark bluish grey limestone. The band contains streaks, veinlets and disseminations of dolomite and silicates over most of its length, except at the northeast end where the limestone lacks such impurities. Dykes commonly intrude the limestone, especially to the southwest.

A chip sample taken across the 122 metre width on the northeast end of the band in the vicinity of a quarry analyzed 54.15 per cent CaO, 0.93 per cent MgO, 0.74 per cent SiO2, 0.23 per cent Al2O3, 0.12 per cent Fe2O3 and nil sulphur (CANMET Report 811, page 176, Sample 30A).

Limestone was quarried on the north side of the Koeye River, 1.6 kilometres northeast of Koeye Point between 1934 and 1969 for the Ocean Falls pulp mill.