Age of the Irish Sea Glaciation of the Midlands
Age of the Irish Sea Glaciation of the Midlands
复制标题
爱尔兰海时代中部地区冰川作用
作者：
F. Shotton
在兰开夏郡、柴郡、斯塔福德郡和什罗普郡发现的湖区和苏格兰西南部的红色冰碛物被认为是爱尔兰海冰川作用的产物。人们早就认识到，类似的物质可以代表不止一次的冰前进，但是湖区和苏格兰巨石的南部边界位于沿着一条线，即特伦特河上的丘奇斯特雷顿-伍尔弗汉普顿-伯顿，而这条“伍尔弗汉普顿线”可以被视为爱尔兰海冰川的最南端延伸。这一进展的日期已被不同地声称为晚-武尔姆，早-武尔姆和里斯（萨勒）。我将其归因于早期-Würm冰川[2，3]，并接受了Boulton和Worsley [4]的观点，即雷克瑟姆-巴尔山冰碛是晚期-Würm冰川的最南端延伸，以此作为对这一观点的佐证。现在，作为A。摩根，古生物学，G. R.库珀和放射性碳测年的R。E. G.威廉斯-可以证明，爱尔兰海冰川向伍尔弗汉普顿线的推进发生在晚威姆时代，也就是说，它可能集中在大约25,000年前的一个日期。
THE red till (or tills) with erratics from the Lake District and south-west Scotland, found in Lancashire, Cheshire, Staffordshire and Shropshire, has been ascribed to what has been called the Irish Sea Glaciation. That more than one ice advance could be represented by similar material has long been recognized, but the southward limit of the Lake District and Scottish boulders lay along a line Church Stretton–Wolverhampton–Burton on Trent, and this “Wolverhampton Line” could be taken as the southernmost extension of the Irish Sea Glacier1. The date of this advance has been variously claimed to be Late-Würm, Early-Würm and Riss (Saale). I have ascribed it to the Early-Würm2,3 and accepted the view of Boulton and Worsley4 that the Wrexham–Barr Hill Moraine was the most southerly extension of the Late-Würm glaciation as eorroboration of this. Now, as the result of work here—stratigraphy by Mr A. V. Morgan, palaeontology by Dr G. R. Coope and radiocarbon dating by Mr R. E. G. Williams—it can be demonstrated that the advance of the Irish Sea Glacier to the Wolverhampton Line occurred in Late-Würm times, that is, it probably centred around a date of about 25,000 yr ago.