Cosmogenic Be-10-ages from the Store Koldewey island, NE Greenland

• Published in: Geografiska Annaler: Series A, Physical Geography
• Main Authors: Håkansson, Lena, Graf, A., Strasky, S., Ivy-Ochs, S., Kubik, P. W., Hjort, C., Schluchter, C.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley-Blackwell 2007
• Subjects: Geology; NORTHERN EAST GREENLAND; SOUTHERN; ICE-SHEET; greenland; SCOTLAND; MOUNTAINS; EROSION; LANDSCAPE; EXPOSURE AGES; LAST GLACIAL MAXIMUM; ARCTIC CANADA; NORWAY; cosmogenic exposure dating; blockfields; Arctic; Canada; Greenland; Norway; Store Koldewey; East Greenland; Ice Sheet; Koldewey island; Store koldewey
• Online Access: https://lup.lub.lu.se/record/1416790; https://doi.org/10.1111/j.1468-0459.2007.00318.x

Earlier work in northeast Greenland has suggested a limited advance of the Greenland Ice Sheet during the Last Glacial Maximum (LGM). However, this concept has recently been challenged by marine geological studies, indicating grounded ice on the continental shelf at this time. New Be-10-ages from the Store Koldewey island, northeast Greenland, suggest that unscoured mountain plateaus at the outer coast were covered at least partly by cold-based ice during the LGM. It is, however, still inconclusive whether this ice was dynamically connected to the Greenland Ice Sheet or not. Regardless of the LGM ice sheet extent, the Be-10 results from Store Koldewey add to a growing body of evidence suggesting considerable antiquity of crystalline unscoured terrain near present and Pleistocene ice sheet margins.