A glaciological approach for the discrimination of Loch Lomond Stadial glacial landforms in the Brecon Beacons, South Wales

Carr, Simon

doi:10.1016/s0016-7878(01)80005-5

Cited by 32 publications

(51 citation statements)

References 27 publications

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“…Evans (1999) showed that the distribution of cirques occupied by these glaciers or by snowpatches was comparable to that of the whole set, but floors averaged 68 m higher and crests, 90 m higher; larger and betterdeveloped cirques are more likely to have been occupied. For the present study, data have been updated from the work of Lynas (1996), Lowe and Larsen (in Ballantyne, 2001), Carr (2001) and Hughes (2002), mainly extending the Late Glacial occupation of cirques. However, the occupation of 83 cirques remains uncertain, pending considerable further fieldwork.…”

Section: Study Area: Walesmentioning

confidence: 99%

Allometric development of glacial cirque form: Geological, relief and regional effects on the cirques of Wales

Evans

2006

Geomorphology

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. ___________________________________________________________________ AbstractHeadward and downward erosion near glacier sources, at rates exceeding fluvial erosion, is

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Section: Study Area: Walesmentioning

confidence: 99%

Allometric development of glacial cirque form: Geological, relief and regional effects on the cirques of Wales

Evans

2006

Geomorphology

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“…In the British Isles this work has focused on reconstructing glaciation during the Loch Lomond Stadial/Younger Dryas (Sissons, 1974(Sissons, , 1979(Sissons, , 1980Gray, 1982;Ballantyne, 1989;Gray and Coxon, 1991;Shakesby andMatthews, 1993, 1996;Mitchell, 1996;Wilson and Clark, 1998;Carr, 2001;Ballantyne, 2002;Hughes, 2002;Shakesby, 2002;Benn and Ballantyne, 2005), whilst in Scandinavia and the European Alps, attention has been more on recent Little Ice Age glacial advances (Nesje and Dahl, 1992;Nesje, 1992;Bickerton and Matthews, 1993;Torsnes et al, 1993;Aa, 1996;Nesje and Dahl, 2000). Paterson (1994: p53) asserts that "climate, along with the physical properties of ice, determines the extent and behaviour of glaciers", a statement that underpins the rationale for the examination of former and contemporary glacier behaviour, leading to examination of past and present glacier behaviour within a climatic context.…”

Section: Introductionmentioning

confidence: 99%

An improved technique for the reconstruction of former glacier mass-balance and dynamics

Carr

Coleman

2007

Geomorphology

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“…Ballantyne 1989;Dahl & Nesje 1992;Carr 2001;Rea & Evans 2007;Golledge et al 2009;Nesje 2009). In the Scottish Highlands, the last decade has seen a renewed focus of research into the extent and behaviour of ice masses during the Lateglacial Younger Dryas (YD), or Loch Lomond Stadial (Greenland Stadial 1 (GS-1)) (12.9 -11.7 cal.…”

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Evolution of a Lateglacial mountain icecap in northern Scotland

Finlayson

Golledge

Bradwell

et al. 2011

Boreas

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Detailed geomorphological mapping of the Beinn Dearg massif in northern Scotland, was conducted to examine the maximum (Younger Dryas) extent, and earlier interstadial evolution, of an ice cap that existed during the Lateglacial period (14.7 -11.7 cal. ka BP). Landform evidence indicates a plateau ice cap configuration, with radial outlet glaciers, during the Younger Dryas. The interpreted age is supported by new cosmogenic exposure ages, and previously reported interstadial sediments beyond the ice cap margin. The reconstructed Younger Dryas Beinn Dearg ice cap covered 176 km 2 , with its summit positioned over the western side of the massif. Area-altitude balance ratio (AABR) equilibrium line altitudes (ELAs) of 570 -580 m were calculated for the ice cap as a whole. The empirically reconstructed ice cap is compared with recent numerical model simulations; both methods produce an ice cap with a similar configuration. However, differences are apparent in the extent of eastern and western outlets (±1-5 km), and in the spatial variation of ELAs. Results suggest that the numerical simulation over-estimates the extent of western ice cap sectors, and under-estimates the extent of eastern ice cap sectors. We attempt to quantify these differences in terms of ice cap mass balance and assess their possible causes. Geomorphological evidence for pre-Younger Dryas ice cap configuration indicates that the Beinn Dearg massif remained an important source during earlier deglaciation. In contrast, the neighbouring Fannich mountains acted as an 'unzipping' zone, and were ice free on their northern side by the Allerød (Greenland Interstadial 1c to 1a). Deglaciation continued over western parts of the Beinn Dearg plateau, with the possibility that glaciers remained in some central and eastern catchments, prior to (Younger Dryas) ice cap (re)growth.Andrew Finlayson (e-mail: afin@bgs.ac.uk), British Geological Survey, Edinburgh, UK and Institute of Geography, University of Edinburgh, UK; Nick Golledge (e-mail: nick.golledge@vuw.ac.nz), Antarctic Research Centre, Victoria University of Wellington, New Zealand; Tom Bradwell (e-mail: tbrad@bgs.ac.uk), British Geological Survey, Edinburgh, UK; Derek Fabel (e-mail: Derek.Fabel@ges.gla.ac.uk ), Department of Geographical and Earth Sciences, University of Glasgow, UK.Reconstructions of palaeo-, or formerly more extensive, ice masses in northwest Europe have enabled inference of past glacier mass balance and climate, and allowed the causes of ice mass fluctuations to be assessed (e.g. Ballantyne 1989;Dahl & Nesje 1992;Carr 2001;Rea & Evans 2007;Golledge et al. 2009;Nesje 2009). In the Scottish Highlands, the last decade has seen a renewed focus of research into the extent and behaviour of ice masses during the Lateglacial Younger Dryas (YD), or Loch Lomond Stadial (Greenland Stadial 1 (GS-1)) (12.9 -11.7 cal. ka BP (Lowe et al. 2008))(e.g. Ballantyne 2002Ballantyne , 2007aBenn & Ballantyne 2005;Finlayson 2006;Golledge 2007;Lukas & Bradwell 2010). Key outcomes of this research have been the...

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A glaciological approach for the discrimination of Loch Lomond Stadial glacial landforms in the Brecon Beacons, South Wales

Cited by 32 publications

References 27 publications

Allometric development of glacial cirque form: Geological, relief and regional effects on the cirques of Wales

Allometric development of glacial cirque form: Geological, relief and regional effects on the cirques of Wales

An improved technique for the reconstruction of former glacier mass-balance and dynamics

Evolution of a Lateglacial mountain icecap in northern Scotland

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