Extent of the last ice sheet in northern Scotland tested with cosmogenic
作者: William M. PhillipsAdrian M. HallColin K. BallantyneSteven BinniePeter W. KubikStewart Freeman
作者单位: 1Idaho Geological Survey, University of Idaho, Moscow, Idaho, USA
2 Institute of Geography, School of GeoSciences, University of Edinburgh, Edinburgh, UK
3 School of Geography and Geosciences, University of St Andrews, Fife, UK
4 Paul Scherrer Institute, c/o Institute of Particle Physics, ETH Hönggerberg, Zurich, Switzerland
5 SUERC, Scottish Enterprise Technology Park, Glasgow, UK
6 School of Geography and Geosciences, University of St Andrews, Fife KY16 9AL, Scotland, UK.
刊名: Journal of Quaternary Science, 2008, Vol.23 (2), pp.101-107
来源数据库: Wiley Journal
DOI: 10.1002/jqs.1161
关键词: Scotlandlast ice sheet10Be exposure datingdeglaciation chronology
原始语种摘要: Abstract(#br)The extent of the last British–Irish Ice Sheet (BIIS) in northern Scotland is disputed. A restricted ice sheet model holds that at the global Last Glacial Maximum (LGM; ca. 23–19 ka) the BIIS terminated on land in northern Scotland, leaving Buchan, Caithness and the Orkney Islands ice‐free. An alternative model implies that these three areas were ice‐covered at the LGM, with the BIIS extending offshore onto the adjacent shelves. We test the two models using cosmogenic 10Be surface exposure dating of erratic boulders and glacially eroded bedrock from the three areas. Our results indicate that the last BIIS covered all of northern Scotland during the LGM, but that widespread deglaciation of Caithness and Orkney occurred prior to rapid warming at ca. 14.5 ka....
全文获取路径: Wiley  (合作)

  • northern 北方的
  • cosmogenic 宇宙成因的
  • sheet 岩席
  • deglaciation 冰消
  • dating 年代测定
  • chronology 年代学
  • widespread 普遍的
  • bedrock 基岩
  • warming 加温
  • exposure 暴露