301-pp24 - UNIVERSITY OF SOUTH ALABAMA Last Time Glacial...

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1 GY 301: Geomorphology Lecture 24: Continental Glaciations UNIVERSITY OF SOUTH ALABAMA http://www.kgs.ku.edu/Publications/PIC/28figures/fig4.jpg Last Time Glacial Geomorphology (Continental variety) Continental glaciers today and in the past Erosive features Depositional features Continental Glaciers Thick ice masses actually depress the lithosphere below sea level http://opa.yale.edu/images/articles/6449-E-Oice.jpg Polished and striated bedrock Roche moutonee Continental Glaciation and Erosion http://upload.wikimedia.org/wikipedia/commons http://libwiki.mcmaster.ca/clip/uploads/Main/rocheformation.jpg Continental Glaciation and Deposition Landforms are produced by the motion of a thick ice sheet Moraines Drumlins Eskers Erratics Outwash Kettle Lakes/Kames Varves Loess http://geopanorama.rncan.gc.ca/calgary/geotour/6_e.php http://z.about.com/d/geology/1/0/E/L/esker.jpg Bedshiel esker Continental Glaciation and Deposition Outwash plains are large areas of deposition produced during by meltwater. http://www.soils.umn.edu http://geoimages.berkeley.edu
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2 Continental Glaciation and Deposition Varves are laminated silt layers deposited in glacial lakes. http://www.backyardnature.net/loess/vertbluf.jpg http://brianmillerphoto.com http://www.geologyrocks.co.uk/system/files/u2/varves.jpg Continental Glaciation and Deposition Loess is wind blown silt deposited on alluvial plains a long way from the glacier.
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