The Nelson Island occurrence is located on the east shore of Blind Bay on Nelson Island, 68 kilometres northwest of Nanaimo.

A 60 to 120 metre wide band of limestone trending 150 degrees extends inland up the steep side of Blind Bay for 600 metres. The limestone likely continues under Blind Bay to the north end of Hardy Island (see Hardy Island 092F 101). This bed is situated within a 670 metre wide roof pendant of Upper Triassic Vancouver Group, Karmutsen Formation(?) volcanics and sediments in quartz diorite of the Jurassic to Tertiary Coast Plutonic Complex. The limestone is enclosed in a gneissic porphyry (altered lavas(?)) and banded green tuffs intruded by a few dykes.

The deposit is generally comprised of fine to coarse-grained white to light bluish high calcium limestone. The northeast side of the band contains silicious blue limestone and dolomite. Thin lenses of white dolomite are scattered throughout the rest of the deposit. Minor serpentinite is developed in fractures. Four chip samples taken in succession across a total width of 32.9 metres in the central part of the band averaged 53.44 per cent CaO, 0.75 per cent MgO, 2.21 per cent insolubles, 0.27 per cent R2O3, 0.26 per cent Fe2O3, 0.97 per cent MnO, 0.013 per cent P2O5, 0.02 per cent sulphur, 42.96 per cent ignition loss, and 0.14 per cent water (Bulletin 40, page 95).

Nelson Island Lime Co. produced 726 tonnes of limestone from a quarry and an adit between 1929 and 1936 for the pulp mill at Wood- fibre.