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The AAPG/Datapages Combined Publications Database

CSPG Bulletin

Abstract


Bulletin of Canadian Petroleum Geology
Vol. 12 (1964), No. 4. (December), Pages 779-807

Devonian Correlations Near Sunwapta Pass, Banff National Park, Alberta

H. R. Belyea, D. J. McLaren

ABSTRACT

A carbonate reef and correlative clastic sequence is developed in the Upper Devonian of the Sunwapta Pass area, Banff and Jasper National Parks, Alberta. Sandstone and sandy dolomite at the base of the section in the Cirrus Mountain-"Big Hill" area are overlain by dark brownish grey stomatoporoid-rich dolomites of the Cairn Formation. These are laterally continuous into the Flume Formation at Nigel Peak where they are overlain by black shales of the Perdrix Formation. The overlying fossiliferous shales and limestones of the Mount Hawk Formation of the Nigel Peak section pass southward on the "Big Hill" to light grey massive coarsely crystalline dolomite, (Peechee Member of the Southesk Formation) interpreted as reef and reef detritus. These are correlative with bedded, dark and light grey, probable lagoonal dolomites on Cirrus Mountain. Dark brown coralliferous beds of the Grotto Member of the Southesk and the overlying light grey Arcs dolomite extend over the whole area. Grey, yellowish-weathering, laminated silty dolomites of the Ronde Member close Southesk deposition and mark the end of Frasnian time. The Southesk is disconformably overlain by the sandy dolomites of the Sassenach Formation, basal Famennian, present at Nigel Peak and Parker Ridge where it is overlain by the Palliser Formation. On "Big Hill" and Cirrus Mountain the Sassenach is missing and the Ronde is directly overlain by the Palliser.

These sections are comparable with the carbonate-clastic sequences of central Alberta, the massive Peechee Member being similar to and correlative with the oil and gas producing upper part of the Leduc Formation.


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