Ice caps existed throughout the Lateglacial Interstadial in northern Scotland

Bradwell, T., Fabel, D. , Stoker, M., Mathers, H. , McHargue, L. and Howe, J. (2008) Ice caps existed throughout the Lateglacial Interstadial in northern Scotland. Journal of Quaternary Science, 23(5), pp. 401-407. (doi: 10.1002/jqs.1181)

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We constrain, in detail, fluctuations of two former ice caps in NW Scotland with multibeam seabed surveys, geomorphological mapping and cosmogenic <sup>10</sup>Be isotope analyses. We map a continuous sequence of 40 recessional moraines stretching from 10 km offshore to the Wester Ross mountains. Surface-exposure ages from boulders on moraine ridges in Assynt and the Summer Isles region show that substantial, dynamic, ice caps existed in NW Scotland between 13 and 14 ka BP. We interpret this as strong evidence that large active glaciers probably survived throughout the Lateglacial Interstadial, and that during the Older Dryas period (ca. 14 ka BP) ice caps in NW Scotland were thicker and considerably more extensive than in the subsequent Younger Dryas Stadial. By inference, we suggest that Lateglacial ice-cap oscillations in Scotland reflect the complex interplay between changing temperature and precipitation regimes during this climatically unstable period (ca. 15-11 ka BP).

Item Type:Articles
Glasgow Author(s) Enlighten ID:Fabel, Dr Derek and McHargue, Dr Lanny and Mathers, Dr Hannah
Authors: Bradwell, T., Fabel, D., Stoker, M., Mathers, H., McHargue, L., and Howe, J.
Subjects: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
ISSN (Online):1099-1417
Published Online:07 April 2008

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