globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2013.05.011
Scopus记录号: 2-s2.0-84880176264
论文题名:
Middle to Late Pleistocene ice extents, tephrochronology and paleoenvironments of the White River area, southwest Yukon
作者: Turner D.G.; Ward B.C.; Bond J.D.; Jensen B.J.L.; Froese D.G.; Telka A.M.; Zazula G.D.; Bigelow N.H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 75
起始页码: 59
结束页码: 77
语种: 英语
英文关键词: Beringia ; Dating ; Last Interglacial ; Macrofossil ; Paleoenvironments ; Pleistocene ; Pollen ; Tephrochronology
Scopus关键词: Beringia ; Dating ; Last interglacial ; Macrofossil ; Paleoenvironments ; Pleistocene ; Pollen ; Tephrochronology ; Deposits ; Isotopes ; Landforms ; Plants (botany) ; Glacial geology ; Beringia ; boreal forest ; fossil record ; glacial deposit ; glacial-interglacial cycle ; glaciation ; Last Glacial-Interglacial ; loess ; marine isotope stage ; paleoenvironment ; paleosol ; Pleistocene ; pollen ; radiocarbon dating ; sedimentary sequence ; steppe ; tephra ; tephrochronology ; tundra ; Canada ; Yukon River ; Yukon Territory
英文摘要: Sedimentary deposits from two Middle to Late Pleistocene glaciations and intervening non-glacial intervals exposed along the White River in southwest Yukon, Canada, provide a record of environmental change for much of the past 200000 years. The study sites are beyond the Marine Isotope stage (MIS) 2 glacial limit, near the maximum regional extent of Pleistocene glaciation. Non-glacial deposits include up to 25m of loess, peat and gravel with paleosols, pollen, plant and insect macrofossils, large mammal fossils and tephra beds. Finite and non-finite radiocarbon dates, and twelve different tephra beds constrain the chronology of these deposits. Tills correlated to MIS 4 and 6 represent the penultimate and maximum Pleistocene glacial limits, respectively. The proximity of these glacial limits to each other, compared to limits in central Yukon, suggests precipitation conditions were more consistent in southwest Yukon than in central Yukon during the Pleistocene. Conditions in MIS 5e and 5a are recorded by two boreal forest beds, separated by a shrub birch tundra, that indicate environments as warm or warmer than present. A dry, treeless steppe-tundra, dominated by Artemisia frigida, upland grasses and forbs existed during the transition from late MIS 3 to early MIS 2. These glacial and non-glacial deposits constrain the glacial limits and paleoenvironments during the Middle to Late Pleistocene in southwest Yukon. © 2013 Elsevier Ltd.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60558
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Derek G. Turner and Brent C. Ward, Department of Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, B.C. V5A 1S6, Canada; Jeffrey D. Bond, Yukon Geological Survey, Yukon Government, P.O. Box 2703, Whitehorse, Yukon Y1A 2C6, Canada; Britta J.L. Jensen and Duane G. Froese, Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, AB T6G 2E3, Canada; Alice M. Telka, PALEOTEC Services, 1-574 Somerset Street W., Ottawa, ON K1R 2K2, Canada; Grant D. Zazula, Yukon Palaeontology Program, Department of Tourism and Culture, Yukon Government, P.O. Box 2703, Whitehorse Y1A 2C6, Canada; Nancy H. Bigelow, Alaska Quaternary Center, University of Alaska, Po Box 755940, Fairbanks, AK, United States

Recommended Citation:
Turner D.G.,Ward B.C.,Bond J.D.,et al. Middle to Late Pleistocene ice extents, tephrochronology and paleoenvironments of the White River area, southwest Yukon[J]. Quaternary Science Reviews,2013-01-01,75
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Turner D.G.]'s Articles
[Ward B.C.]'s Articles
[Bond J.D.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Turner D.G.]'s Articles
[Ward B.C.]'s Articles
[Bond J.D.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Turner D.G.]‘s Articles
[Ward B.C.]‘s Articles
[Bond J.D.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.