Limestone of the Upper Cambrian Lynx Formation is exposed along the John Hart Highway, 3.8 kilometres southeast of Garbit Station of the B.C. Railway. The limestone lies on the east side of a northwest trending anticline.

The roadcut exposes dark grey to black limestone in thin crinkled beds with some scattered 0.15 to 0.6 metre thick layers of light grey dolomite. A sample taken across 15 metres of limestone, perpendicular, to the bedding contained 25.70 per cent CaO, 5.56 per cent MgO, 38.56 per cent insolubles, 2.90 per cent R2O3, 2.03 per cent Fe2O3, 0.04 per cent MnO, 0.12 per cent P2O5, 0.12 per cent sulphur, 27.29 per cent ignition loss and 0.22 per cent water (Minister of Mines Annual Report 1957, page 86). The dolomite bands were excluded from sampling.