Magnetostratigraphy of late neogene glacial, interglacial, and preglacial sediments in the Saskatoon and Regina areas, Saskatchewan, Canada
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Date
2012
Authors
Barendregt, René W.
Enkin, Randolph J.
Tessler, Dez L.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Geophysics of the ASCR
Abstract
Two new records of glacial stratigraphy obtained from borecores collected in southcentral
Saskatchewan are compared to previously published records from Wellsch Valley
and Swift Current Creek in southern Saskatchewan. The comparisons are based on
magnetostratigraphy and tephrochronology, and describe preglacial, glacial, and
interglacial deposits. The new stratigraphy is compared to the composite global marine
oxygen isotope record.
Although the ages and extents of late Pleistocene continental glaciations are relatively
well constrained, they are less well defined for the middle and early Pleistocene. Data
presented here highlight recent studies carried out from borecores and outcrops of
extensive pre-Illinoian (pre-Saalian) glacial deposits. Based on this new data, at least
seven Laurentide (continental) glaciations are recognized in Saskatchewan, and these
records are the most extensive to date in the Northern Interior Plains of Canada.
The magnetostratigraphic records from the Sutherland Overpass and Wascana Creek
sites provide the first evidence of reversely magnetized glacial deposits in the Canadian
Prairies. These deposits can be assigned to the latest Matuyama (MIS 20) and indicate
that Laurentide (continental) glaciations did not impact southern Saskatchewan until the
late Early Pleistocene.
Description
Sherpa Romeo green journal. Permission to archive accepted author manuscript
Keywords
Magnetostratigraphy , Glacial history , Western Canada , Till , Sutherland Overpass Borecore , Wascana Creek Site , Paleomagnetic , Preglacial sediments , Laurentide glaciations , Early pleistocene , Brunhes-Matuyama
Citation
Barendregt, R.W., Enkin, R.J. & Tessler, D.L. (2012). Magnetostratigraphy of late neogene glacial, interglacial, and preglacial sediments in the Saskatoon and Regina areas, Saskatchewan, Canada. Studia Geophysica et Geodaetica. 56, 705-724. DOI: 10.1007/s11200-011-9019-3