Abstract

The discovery of metazoan fossils in the upper part of the Hadrynian Miette Group (Windermere Supergroup) extends the range of the cosmopolitan Ediacara fauna (late Vendian) to a new region, and brings to six the number of genera now known in western North America. The fossils, provisionally identified as Cyclomedusa davidi?, Irridinitus sp., and Protodipleurosoma sp., occur in a greenish-gray, shallow-water siltstone that surrounds stromatolite mounds established on the Yellowhead Platform in the Mount Robson Provincial Park. The locality is stratigraphically about 330 m below the unconformably overlying McNaughton Formation (Gog Group) of probable Cambrian age.

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