Douglas recognizes some differences in the Rocky Mountain and especially the Rundle formation in the outcrops south of the Bow River with the type section at Banff, and he proposes a new nomenclature for these formation. The Rundle formation is given group status, and is divided into two formations and eight members. The divisions are made on the basis of composition and degree of crystalinity or granularity, characteristic bedding, fossil assemblages and insoluble residues.

Four outcropping stratigraphic sections and one Turner Valley subsurface section are given. Different lithofacies are related to the environment of deposition.

Abstract R. F. Bailey, Socony Vacuum Co.

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