The Vavenby occurrence is located 1 to 5 kilometres northwest of Vavenby, on the north side of the North Thompson River. Limestone was quarried at this location until 1933.

A band of Lower Cambrian limestone of the Tshinakin member of the Eagle Bay Formation extends northwest of Vavenby for 4 kilometres, forming a small steep sided mountain known locally as "Lime Bluff". The limestone is estimated to be up to several hundred metres thick. The unit lies enclosed in calcareous chlorite schist and greenstone derived from mafic volcanics. The unit continues southeastward crossing the North Thompson River.

The deposit is comprised mostly of sugary textured, pale blue to nearly white, massive, high calcium limestone that tends to break into small angular fragments. The eastern most knob of the mountain exposes pale blue, brown weathering dolomite with irregular masses and veins of quartz. A representative sample of limestone from a quarry contained 54.95 per cent CaO, 0.30 per cent MgO, 0.68 per cent SiO2, 0.18 per cent Al2O3, 0.14 per cent Fe2O3 and 0.01 per cent sulphur (CANMET Report 811, p. 217, Sample 95).

A small quarry and lime kiln were operated by W. Elliot during the early 1930's, but no production figures are available.