DOI: 10.1016/j.quascirev.2014.07.014
Scopus记录号: 2-s2.0-84905490002
论文题名: Glacier advances in northeastern turkey before and during the global last glacial maximum
作者: Reber R. ; Akçar N. ; Yesilyurt S. ; Yavuz V. ; Tikhomirov D. ; Kubik P.W. ; Schlüchter C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 101 语种: 英语
英文关键词: Anatolia
; Black sea
; Eastern mediterranean
; Maximum ice extent
; Most extensive glaciation
; Quaternary
; Surface exposure dating
Scopus关键词: Catchments
; Glacial geology
; Landforms
; Runoff
; Catchments
; Glacial geology
; Landforms
; Runoff
; Sea level
; Anatolia
; Black sea
; Cosmogenic
; Eastern Mediterranean
; Maximum ice extent
; Most extensive glaciation
; Quaternary
; Surface exposure dating
; Maximum Ice Extent
; Ice
; Ice
; beryllium isotope
; glacial environment
; glaciation
; Holocene
; Last Glacial Maximum
; late glacial
; moraine
; altitude
; catchment
; dating method
; preservation
; sea level change
; tributary
; Anatolia
; Black Sea
; Turkey
英文摘要: Our study in the Başyayla Valley in northeastern Anatolia showed evidence of four glacier advances that built terminal and lateral moraines. Surface exposure dating of boulders on these moraines showed that the Maximum Ice Extent (MIE) was asynchronous with the global Last Glacial Maximum (LGM; 22.1±4.3 thousand years; ka). The local MIE took place at least 57.0±3.5ka ago. The extent of the Başyayla Glacier during this advance is not known exactly because the boulders are only preserved on a lateral moraine. The next advance was prior to 41.5±2.5ka, and it descended down the valley to approximately 2320m above sea level (ma.s.l.), with a glacier length of 5.3km. During the early global LGM, the Başyayla Glacier extended for a distance of 4.9km down to approx. 2430ma.s.l. The last recorded advance occurred during the global LGM. This extension was 0.7km smaller than the local MIE and its terminus reached 2490ma.s.l. only. The exposure ages of boulders in a retreat position at an altitude of approx. 3045ma.s.l. indicate that the valley has remained ice-free since the Lateglacial period. Therefore, the Lateglacial extent was limited to the cirque system in the uppermost part of the catchment. Furthermore, Holocene glacier oscillations seem to be either absent or restricted to solifluction in the whole catchment and to rock glacier movements in the southern tributary of the Başyayla Valley system. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60159
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Geological Sciences, University of Bern, Baltzerstrasse 1+3, CH-3012 Bern, Switzerland; Department of Geography, Çankiri Karatekin University, TR-18100 Çankiri, Turkey; Faculty of Mines, Istanbul Technical University, TR-80626 Maslak, Istanbul, Turkey; Laboratory of Ion Beam Physics, ETH Zürich, CH-8093 Zürich, Switzerland
Recommended Citation:
Reber R.,Akçar N.,Yesilyurt S.,et al. Glacier advances in northeastern turkey before and during the global last glacial maximum[J]. Quaternary Science Reviews,2014-01-01,101