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The last British ice sheet : a review of the evidence utilised in the compilation of the glacial map of Britain.

机译:英国的最后一块冰盖:对英国冰川地图编制中使用的证据的回顾。

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摘要

This paper reviews the evidence presently available (as at December 2003) for the compilation of the Glacial Map of Britain (see [Clark C.D., Evans D.J.A., Khatwa A., Bradwell T., Jordan C.J., Marsh S.H., Mitchell W.A., Bateman, M.D. , 2004. Map and GIS database of glacial landforms and features related to the last British Ice Sheet. Boreas 33, 359–375] and http://www.shef.ac.uk/geography/staff/clark_chris/britice.html) in an effort to stimulate further research on the last British Ice Sheet and promote a reconstruction of ice sheet behaviour based on glacial geology and geomorphology. The wide range of evidence that has been scrutinized for inclusion on the glacial map is assessed with respect to the variability of its quality and quantity and the existing controversies in ice sheet reconstructions. Landforms interpreted as being of unequivocal ice-marginal origin (moraines, ice-contact glacifluvial landforms and lateral meltwater channels) and till sheet margins are used in conjunction with available chronological control to locate former glacier and ice-sheet margins throughout the last glacial cycle. Subglacial landforms (drumlins, flutings and eskers) have been used to demarcate former flow patterns within the ice sheet. The compilation of evidence in a regional map is crucial to any future reconstructions of palaeo-ice sheet dynamics and will provide a clearer understanding of ice sheet configuration, ice divide migration and ice thickness and coverage for the British Ice Sheet as it evolved through the last glacial cycle. \ud\ud
机译:本文回顾了(2003年12月)英国冰河地图汇编的现有证据(参见[Clark CD,Evans DJA,Khatwa A.,Bradwell T.,Jordan CJ,Marsh SH,Mitchell WA,Bateman, MD,2004年。与上一次英国冰原有关的冰川地形和地貌的地图和GIS数据库,Boreas 33,359–375]和http://www.shef.ac.uk/geography/staff/clark_chris/britice.html ),以激发对最后一个英国冰原的进一步研究,并促进基于冰川地质和地貌的冰原行为重建。关于冰质图的质量和数量的可变性以及在冰盖重建中存在的争议,评估了被纳入冰河地图的各种证据。被解释为具有明确的冰缘边缘的地貌(火山岩,与冰接触的冰川河流形地貌和侧向融水通道),直至地表边缘与可用的时间顺序控制结合使用,才能在整个上一个冰川周期中定位前冰川和冰盖边缘。冰河以下的地貌(鼓膜,笛子和浮尘器)已被用来划定冰盖内以前的流动模式。区域地图中的证据汇编对未来任何古冰盖动力学的重建都是至关重要的,并且将使英国冰盖的冰盖构造,冰分迁移以及冰厚度和覆盖范围更加清晰,这将使它更加清晰。冰川周期。 \ ud \ ud

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