This report describes an outcrop of the Mikkwa Formation, located at the junction of Harper and Lambert creeks, and is considered an equivalent to the Grosmont Formation based on
- the similar lithology and paleontology to the Grosmont Formation in outcrop and observed in core,
- the lack of a mappable Mikkwa Formation lithostratigraphic unit in the subsurface, and
- prior correlation of the Mikkwa Formation with the Grosmont Formation.
The outcrop is dolomitic and contains abundant stromatoporoids, representing shallow-water patch reef and reef-proximal paleoenvironments within the Grosmont Formation carbonate platform.