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Friction Cracks as Directional Indicators of Glacial Flow on Mt. Desert Island, Maine

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/22500

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dc.creator Slocum, Robert D. en_US
dc.date.accessioned 2006-07-07T01:39:54Z
dc.date.available 2006-07-07T01:39:54Z
dc.date.issued 1978-01 en_US
dc.identifier.citation The Ohio Journal of Science. v78, n1 (January-February, 1978), 11-17 en_US
dc.identifier.issn 0030-0950 en_US
dc.identifier.uri http://hdl.handle.net/1811/22500
dc.description Author Institution: Department of Botany, The Ohio State University en_US
dc.description.abstract A detailed study of friction cracks from a Late Pleistocene glacial pavement on the southeastern corner of Mt. Desert Island, Maine, has shown that these small scale glacial erosion features may be used as reliable indicators of the direction of glacial flow. Directional information suggests that ice flows in response to microand macrotopography in a limited area. Direction of concavity for a given type of friction crack is constant, but concavity is a useful tool in determining the direction of ice flow only if one distinguishes between crescentic gouges (concave upsteam with respect to glacial flow) and both lunate fractures and crescentic fractures (concave downstream). In non-schistose rock types, the most consistent friction crack parameter is primary fracture dip, which is downstream in the direction of ice movement. en_US
dc.format.extent 1250815 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.title Friction Cracks as Directional Indicators of Glacial Flow on Mt. Desert Island, Maine en_US