A band of limestone of the Lower Cambrian Reeves Member of the Laib Formation outcrops on Swift creek, 500 metres northwest of its confluence with the Salmo River, and continues northeastward for 450 metres. The band contacts metamorphosed sedimentary rocks to the northwest and is intruded to the southeast by granite of the Middle to Late Jurassic Nelson Intrusions. Bedding strikes 049 degrees and dips 40 degrees northwest.

The deposit is comprised of interlayered 2.5 to 5 centimetre thick beds of blue grey and white, medium grained limestone with a few 0.6 to 0.9 metre thick zones of coarse grained white limestone (marble). A sample of chips taken at 0.30 metre intervals across 18.9 metres near the top of a quarry contained 50.89 per cent CaO, 1.7 per cent MgO, 6.32 per cent insolubles, 0.46 per cent R2O3, 0.46 per cent Fe2O3, 0.012 per cent MnO, 0.011 per cent P2O5, 0.014 per cent sulphur and 41.16 per cent ignition loss (Minister of Mines Annual Report 1962, p. 154).

International Marble & Stone Company initially quarried some limestone in 1962 about 90 metres north of Swift Creek on Lot 1594. Quarrying operations recommenced in 1969 and continued up to 1983, when the company encountered access problems to the site. Between 1972 and 1983, 70,469 tonnes of limestone were quarried.