A lens of limestone of the Middle Triassic Brooklyn Formation outcrops on the south slope of a hill between 760 and 975 metres elevation, 4.5 kilometres west-northwest of Midway and 500 metres north of Highway 3. The lens trends north-northeast for approximately 700 metres.

The deposit consists of medium to fine grained, light grey limestone with many argillaceous inclusions. A sample of randomly collected chips contained 54.04 per cent CaO, 0.25 per cent MgO, 2.30 per cent insolubles, 0.30 per cent R2O3, 0.16 per cent Fe2O3, 0.01 per cent MnO, 0.07 per cent P2O5, 0.01 per cent sulphur, 42.85 per cent ignition loss and 0.10 per cent water (Minister of Mines Annual Report 1960, p. 143, Sample 2).