A mass of limestone outcrops just west of the south end of Indata Lake on Limestone Ridge, 120 kilometres northwest of Fort St. James.

The deposit lies within a 200 kilometre long, northwest-trending belt of massive Permian-Pennsylvanian limestone with minor chert and argillite of the Carboniferous to Jurassic Cache Creek Complex. The belt is approximately 6 kilometres wide in the vicinity of Indata Lake. To the east the limestone is separated from Middle Triassic to Lower Jurassic Takla Group andesitic to basaltic volcanics by the Pinchi fault zone. Overlying chert, argillite and greenstone (andesite) of the Cache Creek Complex outcrop to the west.

The limestone is variably dolomitized along the Pinchi fault zone due to hydrothermal alteration. A sample of buff-coloured limestone exposed on the east shore of Indata Lake at its south end analysed 51.32 per cent CaO, 1.38 per cent MgO, 3.07 per cent SiO2, 1.56 per cent Fe2O3+Al2O3 and 3.21 per cent insolubles (Geological Survey of Canada Memoir 252, page 36, Sample 7). A second sample of blue-grey limestone on Limestone Ridge, west of the south end of Indata Lake, analysed 55.14 per cent CaO, 0.07 per cent MgO, 0.22 per cent SiO2, 0.14 per cent Fe2O3+Al2O3 and 0.55 per cent insolubles (Geological Survey of Canada Memoir 212, page 36, Sample 8).