DOI: 10.1016/j.quascirev.2016.08.012
Scopus记录号: 2-s2.0-84983803430
论文题名: Timing and new geomorphologic evidence of the last deglaciation stages in Sierra Nevada (southern Spain)
作者: Palacios D. ; Gómez-Ortiz A. ; Andrés N. ; Salvador F. ; Oliva M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 150 起始页码: 110
结束页码: 129
语种: 英语
英文关键词: 36Clorine isotope
; Cosmogenic exposure age
; Deglaciation
; Oldest dryas
; Sierra Nevada
; Spain
; Younger dryas
Scopus关键词: Geochronology
; Landforms
; Cosmogenic exposure
; Deglaciations
; Oldest Dryas
; Sierra Nevada
; Spain
; Younger Dryas
; Glacial geology
; archaeological evidence
; boulder
; chlorine isotope
; cosmogenic radionuclide
; deglaciation
; geomorphology
; Holocene
; last deglaciation
; Last Glacial Maximum
; moraine
; Older Dryas
; radiocarbon dating
; rock glacier
; Younger Dryas
; Andalucia
; Betic Cordillera
; Sierra Nevada [Betic Cordillera]
; Spain
英文摘要: The main objective of this research is to improve knowledge of the deglaciation stages in Sierra Nevada (southern Spain) by applying 36Cl cosmogenic exposure dating to 28 samples from moraine and fossil rock glacier boulders and glacial polished surfaces, in 5 glaciated valleys around Veleta Peak (3396 m asl; 37°03′02″N 3°20′54″W). The results show that shortly before the Last Glacial Maximum (LGM) and during the LGM, the heads of the glacial valleys were occupied by ice tongues, with possible glacial transfluence between the valleys. After 19 ka, a major glacial regression started, but glaciers during the Oldest Dryas (OD) expanded again and refilled the valley bottoms. The glacial advances of the pre-LGM, LGM and OD formed polygenic moraine systems. During the Bølling-Allerød the glaciers receded and probably disappeared. Thereafter, the valley bottoms remained ice-free. During the Younger Dryas (YD) small glaciers developed again, but only in cirques shaped on east-facing slopes. Subsequently, these glaciers started retreating towards their valley heads and finally disappeared completely. With the onset of the Holocene, rock glaciers developed inside the deglaciated cirques on the eastern slopes of some valleys, but only under the most active and protected headwalls did large complex rock glaciers develop and remained active until the mid-Holocene. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59437
Appears in Collections: 过去全球变化的重建
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作者单位: Research Group of High Mountain Physical Geography, Department of Geography, Complutense University of Madrid, Spain; Department of Geography, University of Barcelona, Spain; Centre for Geographical Studies e IGOT, Universidade de Lisboa, Portugal
Recommended Citation:
Palacios D.,Gómez-Ortiz A.,Andrés N.,et al. Timing and new geomorphologic evidence of the last deglaciation stages in Sierra Nevada (southern Spain)[J]. Quaternary Science Reviews,2016-01-01,150