In situ cosmogenic exposure ages from the Isle of Skye, northwest Scotland: implications for the timing of deglaciation and readvance from 15 to 11 ka

Small, D., Rinterknecht, V., Austin, W., Fabel, D. , Miguens-Rodriguez, M. and Xu, S. (2012) In situ cosmogenic exposure ages from the Isle of Skye, northwest Scotland: implications for the timing of deglaciation and readvance from 15 to 11 ka. Journal of Quaternary Science, 27(2), pp. 150-158. (doi: 10.1002/jqs.1522)

Abstract

We present 10 in situ cosmogenic exposure ages from two moraines on the Isle of Skye. The Strollamus medial moraine was deposited during deglaciation of the Devensian ice sheet and yields a mean exposure age from five samples of 14.3 ± 0.9 ka. The moraine age indicates that a significant ice mass existed on Skye at the time of a regional readvance recorded in Wester Ross, northwest Scotland. Taken at face value the ages suggest that deglaciation did not occur until well into Greenland Interstade 1. The Slapin moraine represents the local limit of the Loch Lomond Readvance (LLR) and yields a mean exposure age from five samples of 11.5 ± 0.7 ka, which is consistent with deposition relating to the LLR. These ages suggest that the maximum extent may have been reached late in the stadial and that some glaciers may have remained active until after the climatic amelioration that marks its end. This scenario is considered unlikely given the nature of the climate during this period, which leads us to call for a locally calibrated production rate.

• Item Type: Articles
• Additional Information: The definitive version is available at www3.interscience.wiley.com
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Small, Dr David and Fabel, Dr Derek and Xu, Dr Sheng and Miguens-Rodriguez, Ms Maria
• Authors: Small, D., Rinterknecht, V., Austin, W., Fabel, D., Miguens-Rodriguez, M., and Xu, S.
• Subjects: G Geography. Anthropology. Recreation > GB Physical geography; Q Science > QE Geology
• College/School: College of Science and Engineering > School of Geographical and Earth Sciences; College of Science and Engineering > Scottish Universities Environmental Research Centre
• Journal Name: Journal of Quaternary Science
• Publisher: Wiley-Blackwell
• ISSN: 0267-8179
• ISSN (Online): 1099-1417
• Copyright Holders: Copyright © 2011 John Wiley & Sons, Ltd.
• First Published: First published in the Journal of Quaternary Science 27(2):150-158
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher