Joint fieldwork completed by Alberta Geological Survey geologists and University of Alberta paleontologists over the summers of 2010-2012 resulted in the description and correlation of Moberly Member (Waterways Formation, Devonian) outcrops along the Athabasca River. This report describes four outcrops of the lower Moberly Member along the Athabasca River in township 90 north of Fort McMurray.
A resistant, biostromal unit of massive stomatoporoids in a brachiopod rudstone matrix is correlatable between the outcrops. Beds above this biostromal unit form low limestone cliffs along the river; beds below this unit outcrop intermittently. The Moberly Member beds described in this report were deformed into gentle folds.