The Nixon Creek showing is located along the west side of the creek, 30 kilometres west of the community of Lake Cowichan

The showing is comprised of two limestone horizons of the Upper Triassic Quatsino Formation, Vancouver Group. These strike northeast for 2.5 kilometres and dip 05 to 40 degrees northwest. The two horizons are separated by a mafic flow or sill. The upper horizon is overlain by argillite of the Upper Triassic Parson Bay Formation, Vancouver Group and volcanics of the Lower Jurassic Bonanza Group. The lower horizon is underlain by mafic volcanics of the Upper Triassic Karmutsen Formation, Vancouver Group. This sequence is segmented by several faults trending west-northwest.

The horizons consist of fine grained, dark grey to black, high calcium limestone. A chip sample taken at 3.0 metre intervals along a 60 metre long road-cut from the upper horizon, contained 54.52 per cent CaO, 0.23 per cent MgO, 1.65 per cent insolubles 0.34 per cent R2O3, 0.21 per cent Fe2O3, 0.03 per cent MnO, 0.04 per cent P2O5, 0.024 per cent sulphur and 43.37 per cent ignition loss (Minister of Mines Annual Report 1966, page 270, Sample 5).