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Cosmogenic nuclide exposure ages from the 'Parallel Roads' of Glen Roy, Scotland

Fabel, D., Small, D., Miguens-Rodriguez, M., and Freeman, S. (2010) Cosmogenic nuclide exposure ages from the 'Parallel Roads' of Glen Roy, Scotland. Journal of Quaternary Science, 25 (4). pp. 597-603. ISSN 0267-8179 (doi:10.1002/jqs.1318)

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Abstract

The 'Parallel Roads' of Glen Roy, Scotland, are the shorelines of former ice-dammed lakes created by the last glaciers to occupy the area. We use surface exposure dating with cosmic ray-produced 10Be in quartz to provide the first numerical age control on the timing of formation of one of one of these shorelines and depositional features in Glen Roy. Four bedrock samples from the surface of the 325m 'Parallel Road' yielded a mean formation age of ca. 11.5-11.9 ka. This age range confirms the long-held view that the 'Parallel Roads' are Loch Lomond Stadial (ca. 12.9-11.5 ka) features. The age range reflects variation in currently available cosmogenic nuclide scaling schemes and the related 10Be production rates. Two samples from the surface of the Turret fan indicate that the 260m lake drained before ca. 10.7-11.0 ka, while two samples from the Brunachan fan suggest that subaerial sedimentation occurred after ca. 9.7-9.9 ka.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fabel, Dr Derek and Freeman, Prof Stewart and Miguens-Rodriguez, Ms Maria
Authors: Fabel, D., Small, D., Miguens-Rodriguez, M., and Freeman, S.
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:0267-8179
ISSN (Online):1099-1417
Published Online:25 August 2009

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