Abstract
ABSTRACTA comprehensive map of glacial landforms is presented for the area of northwest Saskatchewan, Canada. Remote sensing of 1-arc (∼30 m resolution) Shuttle Radar Topography Mission digital elevation models over an area of approximately 15,000 km2 were used as the primary data source for landform identification. A total of 16,856 landforms were identified pertaining to Quaternary glacial and postglacial activity. Ten landform types were mapped: ice flow parallel lineations (flutings, drumlins, mega-scale glacial lineations, and crag-and-tail ridges), moraines (major and minor), ice-thrust ridges, crevasse-fill ridges, meltwater landforms (major and minor meltwater channels and eskers), palaeo-shorelines and dunes. Collectively, these landforms constitute a glacial and postglacial landform record, which exhibits a more complex pattern than previously recognised, with evidence of multiple cross cutting ice flow directions. This geomorphological mapping of the regional landform record provides the prerequisite for future reconstructions of the glacial dynamics and chronology of northwest Saskatchewan.
Highlights
The Canadian Prairies contain a glacial landform record that documents the dynamic behaviour of the Laurentide Ice Sheet during the last glacial cycle
In an effort to aid understanding of the palaeoglaciology of northwest Saskatchewan, this study presents a detailed 15,000 km2 glacial landform map covering the entirety of northwest Saskatchewan (Main Map)
The accompanying map provides a comprehensive representation of the glacial landform record in northwest Saskatchewan
Summary
The Canadian Prairies contain a glacial landform record that documents the dynamic behaviour of the Laurentide Ice Sheet during the last glacial cycle. In order to aid in further studies, the landform record for the entirety of Alberta has recently been synthesised into a province-wide glacial geomorphological map (Atkinson, Utting, & Pawley, 2014a, b). Glacial geomorphological maps of a single landform type, such as glacial lineations, have been presented at a provincial or continental scale only (Shaw, Sharpe, & Harris, 2010; Slimmon, 2011). In an effort to aid understanding of the palaeoglaciology of northwest Saskatchewan, this study presents a detailed 15,000 km glacial landform map covering the entirety of northwest Saskatchewan (Main Map). The study area within which this map ranges is between 106°00′– 110°00′W and 55°00′–60°00′N, encompassing ten 1:250,000 NTS tiles (73M-O, 74B-G, J-O; Figure 1)
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