Morphological and sedimentary responses to ice mass interaction during the last deglaciation
Morphological and sedimentary responses to ice mass interaction during the last deglaciation
复制标题
末次冰消期冰团相互作用的形态和沉积响应
DOI:
10.1002/jqs.2864
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发表时间:
2016
影响因子:
2.3
通讯作者:
Chiverrell R
中科院分区:
文献类型:
--
作者:
Chiverrell R
During decline of the last British–Irish Ice Sheet (BIIS) down‐wasting of ice meant that local sources played a larger role in regulating ice flow dynamics and driving the sediment and landform record. At the Last Glacial Maximum, glaciers in north‐western England interacted with an Irish Sea Ice Stream (ISIS) occupying the eastern Irish Sea basin (ISB) and advanced as a unified ice‐mass. During a retreat constrained to 21–17.3 ka, the sediment landform assemblages lain down reflect the progressive unzipping of the ice masses, oscillations of the ice margin during retreat, and then rapid wastage and disintegration. Evacuation of ice from the Ribble valley and Lancashire occurred first while the ISIS occupied the ISB to the west, creating ice‐dammed lakes. Deglaciation, complete after 18.6–17.3 ka, was rapid (50–25 m a−1), but slower than rates identified for the western ISIS (550–100 m a−1). The slower pace is interpreted as reflecting the lack of a calving margin and the decline of a terrestrial, grounded glacier. Ice marginal oscillations during retreat were probably forced by ice‐sheet dynamics rather than climatic variation. These data demonstrate that large grounded glaciers can display complex uncoupling and realignment during deglaciation, with asynchronous behaviour between adjacent ice lobes generating complex landform records.
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影响因子:
2.9
作者:
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通讯作者:
C. Clark
影响因子:
4
作者:
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DOI:
--
发表时间:
2010
期刊:
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--
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DOI:
--
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1987
期刊:
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作者:
A. Mccabe;G. F. Dardis;P. Hanvey
通讯作者:
P. Hanvey
DOI:
--
发表时间:
2009
期刊:
影响因子:
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作者:
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