Morphology and sedimentology of a high-arctic esker system: Vegbreen, Svalbard |
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Authors: | DAVID HUDDART MATTHEW R BENNETT NEIL F GLASSER |
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Institution: | School of Education and Community Studies, Liverpool John Moores University, I. M. Marsh Campus, Liverpool, L17 6BN, UK;School of Earth and Environmental Sciences, University of Greenwich, Medway University Campus, Pembroke, Chatham Maritime, Kent, ME4 4TB, UK;School of Biological and Earth Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK |
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Abstract: | Although eskers are frequently described glaciofluvial landforms, they are poorly understood. To assist with the interpretation of Pleistocene examples, modern analogue data are required. This paper documents the morphology, sedimentology and formation of a 650 m long esker system in front of the high-arctic glacier Vegbreen in Svalbard. The esker is located between the Neoglacial maximum and the present ice front and appears to have formed both as a supraglacial trough-fill and as a channel/conduit-fill along the suture formed by two confluent glacier lobes. A range of sedimentary facies is preserved within this ridge system providing evidence for braided rivers, ephemeral lakes, episodic flow regimes and sediment gravity flows. This case study provides an important analogue for glaciofluvial sedimentation between retreating ice lobes. |
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