The Allison Creek Limestone prospect is located approximately 800 metres northeast of Allison Creek and 11 kilometres north of Princeton.

The area is underlain by the Eastern facies of the Upper Triassic Nicola Group, comprising mafic augite and hornblende porphyritic pyroclastics and flows. These rocks are intruded by granite stocks of middle to Late Cretaceous age and unconformably overlain by volcanics and sediments of the middle to Upper Cretaceous Spences Bridge Group and clastic sediments of the Eocene Allenby Formation (Princeton Group).

A mass of well-bedded to massive reefoid limestone, hosted in andesitic to basaltic flows and crystal and lithic tuff, trends north for 1.1 kilometres along the western slopes of Oliphant Mountain. The limestone is unconformably overlain to the north by Allenby Formation sediments and varies up to 400 metres in width. Bedding strikes 011 degrees and dips 58 degrees west. Various surface samples taken over the southern portion of the deposit (District Lot 1186) analysed 90 to 97 per cent calcium carbonate (Property File - Imperial Metals and Power Ltd., 1968, page 13).

The deposit was sampled by Imperial Metals and Power Ltd. between 1962 and 1968, while searching for a source of limestone required for the manufacture of metallized iron ore pellets.