A 107 metre long limestone lens up to 40 metres thick outcrops on a hillside 0.8 kilometres northeast of Boundary Falls, about 90 metres above the town. The lens is enclosed in sheared greywacke of the Carboniferous or older Anarchist Group. The limestone strikes 060 degrees and dips 58 degrees northeast.

The deposit is comprised of white and bluish grey streaked, medium grained limestone. A sample of chips, taken across a 30 metre width near the centre of the lens, contained 55.15 per cent CaO, 0.23 per cent MgO, 0.68 per cent insolubles, 0.16 per cent R2O3, 0.14 per cent Fe2O3, 0.01 per cent MnO, 0.13 per cent P2O5, 0.01 per cent sulphur and 43.55 per cent ignition loss (Minister of Mines Annual Report 1960, page 143, Sample 3).

A small quarry was opened up on the southwest side of the deposit. The limestone was burnt in an adjacent kiln for lime earlier this century. No production figures are available.