The Minch palaeo-ice stream, NW sector of the British–Irish Ice Sheet
The Minch palaeo-ice stream, NW sector of the British–Irish Ice Sheet
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明奇古冰流，英国-爱尔兰冰盖的西北部分
DOI：
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发表时间：
2005
影响因子：
2.7
通讯作者：
T. Bradwell
中科院分区：
文献类型：
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作者：
M. Stoker;T. Bradwell
来自苏格兰西北部的英国大陆架的地球物理数据揭示了海床上强烈平行的冰下地床形态。对邻近陆地进行实地测绘，发现了间隔紧密的基岩巨型凹槽和高度细长的鼓状线体形式。所有这些巨型冰川线很可能是在最后一个英国-爱尔兰冰盖明奇古冰流的同一快速流动区域下方形成的。这条冰流在晚德文世冰期（海洋同位素第二阶段）期间排出了英国-爱尔兰冰盖的西北部分，并终止于大陆架边缘附近。邻近的槽口苏拉谢尔扇的大小以及第四纪地层记录中埋藏的巨型冰川线的存在表明，明奇的快速冰盖流动是几个中更新世冰川作用的一个特征。
Geophysical data from the UK continental shelf off NW Scotland reveal strongly parallel subglacial bedforms on the sea bed. Field mapping on the adjacent landmass has identified closely spaced bedrock megagrooves and highly elongate drumlinoid forms. All these mega-scale glacial lineations probably formed beneath the same fast-flowing zone of the last British–Irish Ice Sheet, The Minch palaeo-ice stream. This ice stream drained the NW sector of the British–Irish Ice Sheet during the Late Devensian Glaciation (marine isotope stage 2) and terminated near the edge of the continental shelf. The size of the adjacent trough-mouth Sula Sgeir Fan and the presence of buried mega-scale glacial lineations within the Quaternary stratigraphic record imply that fast ice-sheet flow in The Minch has been a feature of several mid- to late Pleistocene glaciations.