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Active drumlin field revealed at the margin of Múlajökull, Iceland: A surge-type glacier

Journal article
Authors Mark D. Johnson
Anders Schomacker
Ivar Benediktsson
Alessa Geiger
Amanda Fergusson
Olafur Ingolsson
Published in Geology
Volume 38
Issue 10
Pages 943-946
Publication year 2010
Published at Department of Earth Sciences
Pages 943-946
Language en
Keywords drumlin iceland surge
Subject categories Quaternary geology


ABSTRACT Recent marginal retreat of Múlajökull, a surge-type outlet glacier of Hofsjökull, Iceland, has revealed a drumlin fi eld consisting of more than 50 drumlins. The drumlins are 90–320 m long, 30–105 m wide, 5–10 m in relief, and composed of multiple beds of till deposited by lodgment and bed deformation. The youngest till layer truncates the older units with an erosion surface that parallels the drumlin form. Thus, the drumlins are built up and formed by a combination of subglacial depositional and erosional processes. Field evidence suggests each till bed to be associated with individual recent surges. We consider the fi eld to be active in the sense that the drumlins are shaped by the current glacial regime. The Múlajökull fi eld is the only known active drumlin fi eld, and is therefore a unique analogue to Pleistocene drumlin fi elds.

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