Open File Report 2012-17

Open File Report 2012-17

OFR 2012-17

Grosmont Formation (Mikkwa Formation Outcrop T106-R2W5-01) on Harper Creek, north-central Alberta (NTS 84J/01)

Author(s) Schneider, C.L. Fenton, M.M. Weiss, J.A. Date 2013-04-10

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.