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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Abstracts: A Stratigraphic Study of the Regina Basin, Saskatchewan
The Regina Basin area (National Topographic series maps 72 Hand I, 62-E) comprises 6260 square miles, lying between 103° 50 and 106° 00 West Longitude and between 49° 50 and 50° 45 North Latitude in southeastern Saskatchewan.
The surficial sediment is mainly lacustrine silt and clay. The thickness of lacustrine sediment ranges from a few feet near the edge of the basin to 35 feet in front of the Condie Moraine. Stratigraphically, the lake silt and clay is divided into three units. Moose Jaw Clay was deposited during the first lake phase, and Condie Clay was deposited during the third and last lake phase. The Regina Basin drained completely between the phases forming a dry plant-bearing surface. Organic debris and gypsum mark the hiatuses between the units.
The Roleau Basin within the Regina Basin was formed by faulting probably by salt-solution collapse along a transcurrent fault parallel to the Missouri Coteau. A depression of approximately 40 feet occurring on the surface of the Upper Cretaceous bedrock outlines the Roleau Basin.
Isostatic adjustment in the Regina Basin is marked by five isobases. Delineation of the isobases is complicated by faulting in the basin.
Nineteen species belonging to seven genera of Ostracoda are figured and described from the sediments of the Regina and Roleau Basins and the Qu'Appelle Valley fill. Seven species of Ostracoda are proposed as new. On the basis of ostracods and molluscs, the Qu'Appelle Valley fill is divided into five distinct depositional environments.
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ACKNOWLEDGMENTS AND ASSOCIATED FOOTNOTES
1962, University of Alberta, M.Sc.
Copyright © 2004 by The Society of Canadian Petroleum Geologists. All Rights Reserved.
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