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DOI	10.1016/j.quascirev.2019.105897
	Timing of the local last glacial maximum in Terra Nova Bay; Antarctica defined by cosmogenic dating
	Rhee H.H.; Lee M.K.; Seong Y.B.; Hong S.; Lee J.I.; Yoo K.-C.; Yu B.Y.
发表日期	2019
ISSN	0277-3791
卷号	221
英文摘要	The Jangbogo Hills are erratic-covered landforms consisting of a series of benches that are parallel to the length of Campbell Glacier, northern Victoria Land, Antarctica. We sampled 41 erratic cobbles from six benches to reveal the exposure times of glacier erratics using in situ 10Be and 26Al. The erratics from the upper three benches yield exposure ages older than Marine Isotope Stage (MIS) 4, with most exposed since MIS 5. However, the lower three benches exhibit tight clusters of exposure ages that range from MIS 3 to the Holocene. Campbell Glacier underwent rapid downwasting during MIS 5, centered at 98.3 ka from its maximum position at the penultimate glacial maximum (PGM). This downwasting continued throughout the last glacial period, with a potential minor stagnation around a bench (∼90 m asl) between 35.4 and 17.0 ka. Our cosmogenic nuclides surface exposure dating results highlight three important points concerning the glacial history of Terra Nova Bay since the penultimate glacial maximum (PGM) in northern Victoria Land, Antarctica: 1) Campbell Glacier was thicker at the PGM than at the global last glacial maximum (LGM); 2) the local LGM occurred during MIS 4; and 3) the extent of Campbell Glacier during the global LGM (90 m) was much smaller than previously assumed (300–400 m). Hence, the previous view that the local LGM (MIS 4) in Victoria Land, Antarctica was synchronous with the global LGM (MIS 2) should be treated with caution. © 2019 Elsevier Ltd
语种	英语
scopus关键词	Isotopes; Timing circuits; Cosmogenic dating; Cosmogenic nuclides; Glacial history; Last Glacial Maximum; Last glacial period; Marine isotope stages; Surface exposure dating; Terra nova bays; Glacial geology; cosmogenic radionuclide; dating method; glacial history; Holocene; landform; Last Glacial Maximum; marine isotope stage; Antarctica; Campbell Island; Campbell Islands; East Antarctica; Terra Nova Bay; Victoria Land
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/151771
作者单位	Department of Geography, Korea University, Seoul, 02841, South Korea; Division of Polar Paleoenvironment, Korea Polar Research Institute, Incheon, 21990, South Korea; AMS Laboratory, Korea Institute of Science and Technology, Seoul, 02792, South Korea
推荐引用方式 GB/T 7714	Rhee H.H.,Lee M.K.,Seong Y.B.,et al. Timing of the local last glacial maximum in Terra Nova Bay; Antarctica defined by cosmogenic dating[J],2019,221.
APA	Rhee H.H..,Lee M.K..,Seong Y.B..,Hong S..,Lee J.I..,...&Yu B.Y..(2019).Timing of the local last glacial maximum in Terra Nova Bay; Antarctica defined by cosmogenic dating.Quaternary Science Reviews,221.
MLA	Rhee H.H.,et al."Timing of the local last glacial maximum in Terra Nova Bay; Antarctica defined by cosmogenic dating".Quaternary Science Reviews 221(2019).