DOI: 10.1016/j.quascirev.2017.11.029
Scopus记录号: 2-s2.0-85037365988
论文题名: New age constraints for the Saalian glaciation in northern central Europe: Implications for the extent of ice sheets and related proglacial lake systems
作者: Lang J. ; Lauer T. ; Winsemann J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 180 起始页码: 240
结束页码: 259
语种: 英语
英文关键词: Ice-dammed lake
; Lake-outburst flood
; Luminescence dating
; Middle Pleistocene
; Saalian glaciation
Scopus关键词: Deposits
; Geochronology
; Glacial geology
; Glaciers
; Lakes
; Luminescence
; Ice-dammed lake
; Luminescence dating
; Middle Pleistocene
; Outburst floods
; Saalian glaciation
; Ice
; bedrock
; deglaciation
; flood
; geomorphology
; ice flow
; ice margin
; ice sheet
; ice stream
; ice-dammed lake
; luminescence dating
; paleoceanography
; proglacial environment
; reconstruction
; Saalian
; Atlantic Ocean
; Europe
; Fennoscandia
; Lower Rhine Embayment
; North Sea
; Sweden
英文摘要: A comprehensive palaeogeographic reconstruction of ice sheets and related proglacial lake systems for the older Saalian glaciation in northern central Europe is presented, which is based on the integration of palaeo-ice flow data, till provenance, facies analysis, geomorphology and new luminescence ages of ice-marginal deposits. Three major ice advances with different ice-advance directions and source areas are indicated by palaeo-ice flow directions and till provenance. The first ice advance was characterised by a southwards directed ice flow and a dominance of clasts derived from southern Sweden. The second ice advance was initially characterised by an ice flow towards the southwest. Clasts are mainly derived from southern and central Sweden. The latest stage in the study area (third ice advance) was characterised by ice streaming (Hondsrug ice stream) in the west and a re-advance in the east. Clasts of this stage are mainly derived from eastern Fennoscandia. Numerical ages for the first ice advance are sparse, but may indicate a correlation with MIS 8 or early MIS 6. New pIRIR290 luminescence ages of ice-marginal deposits attributed to the second ice advance range from 175 ± 10 to 156 ± 24 ka and correlate with MIS 6. The ice sheets repeatedly blocked the main river-drainage pathways and led to the formation of extensive ice-dammed lakes. The formation of proglacial lakes was mainly controlled by ice-damming of river valleys and major bedrock spillways; therefore the lake levels and extends were very similar throughout the repeated ice advances. During deglaciation the lakes commonly increased in size and eventually drained successively towards the west and northwest into the Lower Rhine Embayment and the North Sea. Catastrophic lake-drainage events occurred when large overspill channels were suddenly opened. Ice-streaming at the end of the older Saalian glaciation was probably triggered by major lake-drainage events. © 2017 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112336
Appears in Collections: 气候减缓与适应
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作者单位: Institut für Geologie, Leibniz Universität Hannover, Callinstraße 30, Hannover, 30167, Germany; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig, 04103, Germany
Recommended Citation:
Lang J.,Lauer T.,Winsemann J.. New age constraints for the Saalian glaciation in northern central Europe: Implications for the extent of ice sheets and related proglacial lake systems[J]. Quaternary Science Reviews,2018-01-01,180