Loch Lomond Stadial glaciers in the Aran and Arenig Mountains, North Wales, Great Britain

Philip D. Hughes

doi:10.1002/gj.894

Loch Lomond Stadial glaciers in the Aran and Arenig Mountains, North Wales, Great Britain

Philip D. Hughes

Geography

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Abstract

Geomorphological evidence for four former local glaciers has been mapped in the Aran and Arenig Mountains, North Wales. Former glacial extent was deduced from the distribution and assemblage of end and lateral moraines, hummocky moraine, boulder limits, drift limits and periglacial trimlines. Comparison of infilled lake sediment stratigraphies inside and outside of the former glacier limits suggests a Loch Lomond Stadial (Late Devensian) age of the former glaciers (c. 12.9-11.5 cal. ka BP). This finding is also supported by periglacial-landform contrasts between the land inside and outside of the glacier limits. Reconstruction of the four glaciers illustrates a mean equilibrium line altitude (ELA) of c. 504 m. From the reconstructed ELAs and the combination of precipitation and snowblow input for total accumulation, by analogy with Norwegian glaciers, a mean sea-level July temperature is calculated at 8.4°C. Copyright © 2002 John Wiley & Sons, Ltd.

Original language	English
Pages (from-to)	9-15
Number of pages	6
Journal	Geological Journal
Volume	37
Issue number	1
DOIs	https://doi.org/10.1002/gj.894
Publication status	Published - 2002

Keywords

Equilibrium line altitude
Late-glacial
Palaeoclimatology
Wales

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abstract = "Geomorphological evidence for four former local glaciers has been mapped in the Aran and Arenig Mountains, North Wales. Former glacial extent was deduced from the distribution and assemblage of end and lateral moraines, hummocky moraine, boulder limits, drift limits and periglacial trimlines. Comparison of infilled lake sediment stratigraphies inside and outside of the former glacier limits suggests a Loch Lomond Stadial (Late Devensian) age of the former glaciers (c. 12.9-11.5 cal. ka BP). This finding is also supported by periglacial-landform contrasts between the land inside and outside of the glacier limits. Reconstruction of the four glaciers illustrates a mean equilibrium line altitude (ELA) of c. 504 m. From the reconstructed ELAs and the combination of precipitation and snowblow input for total accumulation, by analogy with Norwegian glaciers, a mean sea-level July temperature is calculated at 8.4°C. Copyright {\textcopyright} 2002 John Wiley & Sons, Ltd.",

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T1 - Loch Lomond Stadial glaciers in the Aran and Arenig Mountains, North Wales, Great Britain

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AB - Geomorphological evidence for four former local glaciers has been mapped in the Aran and Arenig Mountains, North Wales. Former glacial extent was deduced from the distribution and assemblage of end and lateral moraines, hummocky moraine, boulder limits, drift limits and periglacial trimlines. Comparison of infilled lake sediment stratigraphies inside and outside of the former glacier limits suggests a Loch Lomond Stadial (Late Devensian) age of the former glaciers (c. 12.9-11.5 cal. ka BP). This finding is also supported by periglacial-landform contrasts between the land inside and outside of the glacier limits. Reconstruction of the four glaciers illustrates a mean equilibrium line altitude (ELA) of c. 504 m. From the reconstructed ELAs and the combination of precipitation and snowblow input for total accumulation, by analogy with Norwegian glaciers, a mean sea-level July temperature is calculated at 8.4°C. Copyright © 2002 John Wiley & Sons, Ltd.

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Loch Lomond Stadial glaciers in the Aran and Arenig Mountains, North Wales, Great Britain

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Keywords

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