气候变化领域集成服务门户(CCPortal): A high-resolution late Quaternary depositional history and chronology for the southern portion of the Lake Mungo lunette; semi-arid Australia

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DOI	10.1016/j.quascirev.2020.106224
	A high-resolution late Quaternary depositional history and chronology for the southern portion of the Lake Mungo lunette; semi-arid Australia
	Jankowski N.R.; Stern N.; Lachlan T.J.; Jacobs Z.
发表日期	2020
ISSN	0277-3791
卷号	233
英文摘要	The Willandra Lakes region sits on the southern margin of Australia's arid core and is one of the oldest localities on the continent known to have been occupied by Australia's First People. The archaeological traces that accumulated in the Lake Mungo lunette paint a picture of changing land use over the past ∼50 thousand years (ka) and some of these are likely to have been responses to changes in palaeoenvironmental conditions. This study set out to determine the finest temporal resolution that can be used to study the depositional and palaeoenvironmental history of the Lake Mungo lunette. The investigation focused on the depositional history documented within stratigraphy exposed in an eroding gully in the southern part of the lunette; Gully 10. A stratigraphic framework was developed using sedimentological and soil micromorphological analysis. This framework was then fixed in time by 56 single-grain optically stimulated luminescence (OSL) age estimates. These data sets were then combined into a Bayesian model that indicated three depositional phases: >100 ka (LU1), ∼65–33 ka (LU2–LU3), and from ∼30 to 16 ka (LU4–LU9), with the late Pleistocene and Holocene samples (LU10–11) not being modelled. Furthermore, the redating of thirteen Lower and Upper Mungo OSL samples from Bowler et al. (2003)’s study of the southern tip of the lunette yielded younger age estimates for twelve of these, bringing them into line with previously published independent age control as well as the ages presented in this study. This study provides an approach for future efforts to establish consistency in age estimation and palaeoenvironmental interpretation along the length of the lunette. © 2020 Elsevier Ltd
语种	英语
scopus关键词	Bayesian networks; Lakes; Land use; Landforms; Luminescence; Stratigraphy; Bayesian model; High resolution; Independent age control; Late Pleistocene; Late quaternary; Optically stimulated luminescence; Stratigraphic framework; Temporal resolution; Deposition; arid region; depositional environment; depositional sequence; environmental history; gully erosion; Holocene; lacustrine deposit; land use change; luminescence; paleoenvironment; sampling; Australia; Lake Mungo; New South Wales; Willandra Lakes
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/151549
作者单位	Centre for Archaeological Science, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, Australia; Australian Research Council (ARC) Centre of Excellence for Australian Biodiversity and Heritage, University of Wollongong, Wollongong, Australia; Department of Archaeology and History, La Trobe University, Bundoora, Australia
推荐引用方式 GB/T 7714	Jankowski N.R.,Stern N.,Lachlan T.J.,et al. A high-resolution late Quaternary depositional history and chronology for the southern portion of the Lake Mungo lunette; semi-arid Australia[J],2020,233.
APA	Jankowski N.R.,Stern N.,Lachlan T.J.,&Jacobs Z..(2020).A high-resolution late Quaternary depositional history and chronology for the southern portion of the Lake Mungo lunette; semi-arid Australia.Quaternary Science Reviews,233.
MLA	Jankowski N.R.,et al."A high-resolution late Quaternary depositional history and chronology for the southern portion of the Lake Mungo lunette; semi-arid Australia".Quaternary Science Reviews 233(2020).