ABSTRACT
Twenty-four sections of Devonian rocks have been examined in the Alberta Rocky Mountains and contiguous foothills, most of them between the valleys of the Bow and Athabaska rivers. In the Athabaska valley the Devonian is divisible into four formations, which are in ascending order: the Flume dolomite, Perdrix shale, Cheviot limestone and dolomite, and Palliser dolomite. On the southeast, near the North Saskatchewan River, the Perdrix shale disappears, due to a rather abrupt facies change, and from this point to Banff and beyond, two formations embrace all of the Devonian rocks. These are the Fairholme and Palliser formations. The Palliser formation extends from Crowsnest Pass to the Athabaska River without significant change in lithologic character or thickness. Most of the beds are Upper Devonian in age, but the Flume may be very late Middle Devonian.
