At the Wardner North occurrence, limestone of the Mississippian Rundle Group forms a 90 metre high hill on the east side of the Kootenay River, approximately 2 kilometres north of the highway bridge at Wardner. The limestone strikes west and dips southward.

On the southeast side of the hill the rock consists of coarse- grained, light brownish grey, high calcium limestone. The northeast side of the hill exposes fine-grained, dark grey limestone containing some silicified fossils and chert. Two grab samples analyzed as follows (in per cent) (CANMET Report 811, page 202, Samples 73A, 73B): Sample CaO MgO SiO2 Al2O3 Fe2O3 Sulphur 73A 55.24 0.29 0.38 0.12 0.06 nil 73B 54.37 0.44 1.50 0.37 0.07 nil Sample 73A is of the coarse-grained limestone taken midway up the side of the hill. Sample 73B is of the fine-grained limestone.