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.
Schneider, C.L., Fenton, M.M. and Weiss, J.A. (2013): Grosmont Formation (Mikkwa Formation outcrop T106-R2W5-01) on Harper Creek, north-central Alberta (NTS 84J/01); Energy Resources Conservation Board, ERCB/AGS Open File Report 2012-17, 21 p.