Athabasca Glacier, Canada - a field example of subglacial ice and till erosion?

The Athabasca Glacier, resting on a rigid bed, provides an excellent example of subglacial ice and till erosion. The presence of a thin mobile till layer is shown by the presence of flutes, saturated till layer, push moraines and ploughed boulders. Cross‐cutting striations, v‐shaped striations and r...

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Bibliographic Details
Published inEarth surface processes and landforms Vol. 31; no. 1; pp. 65 - 80
Main Author Hart, Jane K.
Format Journal Article
LanguageEnglish
Published Chichester, UK John Wiley & Sons, Ltd 01.01.2006
Wiley
Subjects
Bgi / Prodig
flutes
glacial erosion
Hydrometeorology
Nivology. Glaciology
Physical geography
stoss-and-lee clasts
subglacial processes
Alberta
Canada
Glacial striation
Moraine
Glacier
Glacial features
Glacial erosion
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Summary:The Athabasca Glacier, resting on a rigid bed, provides an excellent example of subglacial ice and till erosion. The presence of a thin mobile till layer is shown by the presence of flutes, saturated till layer, push moraines and ploughed boulders. Cross‐cutting striations, v‐shaped striations and reversed stoss‐and‐lee clasts are indicative of clasts rotating within this layer. As the till moves it erodes the bedrock and clasts within it. A combination of erosion by ice and till produces stoss‐and‐lee‐clasts and generates striations on flutes and embedded clasts, as well as eroding the bedrock into a continuum of smoothed, rounded and streamlined forms. Copyright © 2005 John Wiley & Sons, Ltd.
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ISSN:0197-9337
1096-9837
DOI:10.1002/esp.1233