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MAP 604

Glacial Landforms of Alberta, Canada

Abstract: A review of government survey mapping and research literature, supplemented by new analysis of remote sensing data was used to produce a glacial map and accompanying geographic information system (GIS) database of landforms associated with the advance and retreat of the Laurentide and Cordilleran ice sheets across Alberta during the last glaciation. Emphasis is placed on landforms that can be associated with specific glaciodynamic conditions and provide insights into the configuration and flow geometry of these ice sheets. Landforms presented in this synthesis include streamlined subglacial bedforms, moraines, ice-thrust moraines, glacially overridden moraines, meltwater channels, eskers, crevasse-fill ridges and erratic dispersal trains. Most surficial geology mapping in Alberta has been conducted by government surveys over the last 40 years. However, to date, line features from these surficial geology maps have not been synthesized into a single compilation. Moreover, due to the recent availability of the Light Detection and Ranging (LiDAR) bare-earth digital elevation model (DEM) across 303,752 km2 of Alberta (46% of the province), it is now possible to verify, and where possible, augment previous mapping, particularly in regions of dense forest cover that are difficult to map using traditional airphoto-based interpretative methods. Place Keywords 72e 72l 72m 73d 73e 73l 73m 74d 74e 74l 74m 82g 82h 82i 82j 82n 82o 82p 83a 83b 83c 83d 83e 83f 83g 83h 83i 83j 83k 83l 83m 83n 83o 83p 84a 84b 84c 84d 84e 84f 84g 84h 84i 84j 84k 84l 84m 84n 84o 84p alberta canada Theme Keywords channels eskers geology glacial fluting glacial history ice thrust ridges moraines quaternary surficial mapping

Atkinson, N.  Utting, D.J.  Pawley, S.M.  2014-07-15