气候变化领域集成服务门户(CCPortal): Etched linear dunefields of the Nullarbor Plain; A record of Pliocene-Pleistocene wind patterns across southern Australia

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DOI	10.1016/j.palaeo.2020.109911
	Etched linear dunefields of the Nullarbor Plain; A record of Pliocene-Pleistocene wind patterns across southern Australia
	Burnett S.; Webb J.A.; White S.; Lipar M.; Ferk M.; Barham M.; O'Leary M.J.; Glover F.S.
发表日期	2020
ISSN	0031-0182
卷号	557
英文摘要	The southern Nullarbor Plain is covered by low amplitude (generally 1–2 m) parallel ridges and swales with variable wavelength (300–900 m). The ridges are stony; the swales hold thin deposits of unconsolidated silt and clay. The ridges and swales have previously been attributed to joint control but are not parallel to joints exposed in cave roofs. Instead, they have a striking similarity to central Australian linear sand dunes: they are parallel, regularly spaced and most importantly, fork in a consistent direction. They are here explained as the etched footprints of an extensive linear dune system that once covered much of the southern Nullarbor. Rainwater collecting in the troughs between the sand dunes dissolved the underlying limestone to produce the swales. Recognition of this dune field fills a major gap in the distribution of linear dunes across Australia. The dunes have subsequently disappeared, apart from red aeolian sand in dolines in the southeastern part of the Nullarbor; most of the sand was probably blown offshore. The ridge and swales are oriented predominantly north-south in the west, and northeast-southwest and northwest-southeast in the centre and east, due to deposition by northerly and westerly winds respectively, as shown by directions of forking. The north-south Nullarbor dunes are probably older and may have been deposited in the arid climate of the late Neogene; this would make them the oldest linear dunes in Australia, remnants of an early phase of linear dune activity that has been removed or overprinted elsewhere. The change in wind direction shown by the dune orientation could represent northward migration of sub-tropical high-pressure systems during the late Neogene. © 2020 Elsevier B.V.
英文关键词	GIS; Longitudinal dunes; Paleoclimate; Ridge; Swale
语种	英语
scopus关键词	dune field; eolian deposit; limestone; Neogene; Pliocene-Pleistocene boundary; rainwater; red soil; wind direction; Australia; Nullarbor Plain
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150356
作者单位	Department of Ecology, Environment and Evolution, La Trobe UniversityVictoria 3086, Australia; Anton Melik Geographical Institute, Research Centre of the Slovenian Academy of Sciences and Arts, Ljubljana, Slovenia; School of Earth and Planetary Sciences, Curtin UniversityWA 6845, Australia; School of Earth Sciences, The University of Western AustraliaWA 6009, Australia
推荐引用方式 GB/T 7714	Burnett S.,Webb J.A.,White S.,et al. Etched linear dunefields of the Nullarbor Plain; A record of Pliocene-Pleistocene wind patterns across southern Australia[J],2020,557.
APA	Burnett S..,Webb J.A..,White S..,Lipar M..,Ferk M..,...&Glover F.S..(2020).Etched linear dunefields of the Nullarbor Plain; A record of Pliocene-Pleistocene wind patterns across southern Australia.Palaeogeography, Palaeoclimatology, Palaeoecology,557.
MLA	Burnett S.,et al."Etched linear dunefields of the Nullarbor Plain; A record of Pliocene-Pleistocene wind patterns across southern Australia".Palaeogeography, Palaeoclimatology, Palaeoecology 557(2020).