气候变化领域集成服务门户(CCPortal): Late Pleistocene glaciers in Greece: A new 36Cl chronology

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DOI	10.1016/j.quascirev.2020.106528
	Late Pleistocene glaciers in Greece: A new 36Cl chronology
	Allard J.L.; Hughes P.D.; Woodward J.C.; Fink D.; Simon K.; Wilcken K.M.
发表日期	2020
ISSN	0277-3791
卷号	245
英文摘要	Glaciers formed in the highest mountains of Greece during the Late Pleistocene, but the timing of glacier maxima is poorly understood. This paper presents 27 36Cl terrestrial cosmogenic nuclide exposure ages from glacial boulders on Mount Tymphi (2497 m a.s.l., 40oN) in Epirus, northwest Greece. These ages address both a significant geographical gap in Mediterranean glacial chronologies and a temporal gap in the glacial history of this region by targeting the previously undated Late Pleistocene record. Late Pleistocene glaciers were restricted to the cirques and upper valleys of Mount Tymphi. Terminal and lateral moraines between 1700 m and 2050 m a.s.l. mark the extent of Late Pleistocene glaciers on the southern side of Mount Tymphi. Moraines marking the maximum extent of Late Pleistocene glaciation date to 29.0 ± 3.0 ka and 25.7 ± 2.6 ka, taking the oldest ages as most representative of moraine emplacement. Glaciers had retreated to the high cirques by 24.5 ± 2.4 ka during Heinrich Stadial 2. Rock glaciers formed under cold and drier conditions during this period of glacier retreat. This 36Cl dataset complements published U-series ages from secondary calcites in glacial sediments below 1700 m elevation, which demonstrate more extensive Middle Pleistocene glaciations in MIS 6 and MIS 12. A Late Pleistocene glacier maxima on Mount Tymphi at 25.7–29 ka is in good agreement with well-preserved outwash sediments dating to 24–28 ka in the Voidomatis River record downstream and is consistent with the Ioaninna basin pollen record indicating cool and wet conditions, most favourable for glacier growth, at 25–30 ka. © 2020
英文关键词	Cosmogenic surface exposure dating; Geomorphology; Glacial geochronology; Glaciation; Greece; Mediterranean; Moraine; Pindus mountains; Quaternary
语种	英语
scopus关键词	Calcite; Glacial chronology; Glacial sediments; Glacier retreat; Late Pleistocene; Late Pleistocene glaciations; Late Pleistocene record; Middle Pleistocene; Terrestrial cosmogenic nuclides; Glacial geology; boulder; chronology; glacial history; glaciation; glacier retreat; moraine; Pleistocene; pollen; Greece; Ioannina; Mount Tymphi; Pindus Mountains
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151334
作者单位	Department of Geography, The University of Manchester, Manchester, M13 9PL, United Kingdom; Australian Nuclear Science and Technology Organisation, PMB1, MenaiNSW 2234, Australia
推荐引用方式 GB/T 7714	Allard J.L.,Hughes P.D.,Woodward J.C.,et al. Late Pleistocene glaciers in Greece: A new 36Cl chronology[J],2020,245.
APA	Allard J.L.,Hughes P.D.,Woodward J.C.,Fink D.,Simon K.,&Wilcken K.M..(2020).Late Pleistocene glaciers in Greece: A new 36Cl chronology.Quaternary Science Reviews,245.
MLA	Allard J.L.,et al."Late Pleistocene glaciers in Greece: A new 36Cl chronology".Quaternary Science Reviews 245(2020).