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DOI	10.1016/j.quascirev.2024.108517
	Quaternary clifftop and last glacial maximum dunes around the Great Australian Bight
	Short, A. D.; Tamura, T.; Oliver, T. S. N.; Detmar, S.; Fotheringham, D.
发表日期	2024
ISSN	0277-3791
EISSN	1873-457X
起始页码	327
卷号	327
英文摘要	The coast of the Great Australian Bight contains perhaps the largest concentrations of clifftop dunes in the world. It consists of 1350 km of calcarenite and limestone cliffs of which 508 km are capped by clifftop dunes covering an area of 958 km(2). To develop a preliminary chronology of dune emplacement and an assessment of triggering mechanisms, 89 OSL dates were obtained from clifftop dunes spread around the Bight. Starting in the east, dunes were sampled for dating on Kangaroo Island, southern Yorke Peninsula, western Eyre Peninsula, Bunda (Nullarbor) Cliffs, Hampton Bluffs, Twilight Cove, Baxter Cliffs and the Wylie Scarp. In addition, the large Roe Plain dune complex that merge with the Baxter-Hampton clifftop dunes were also dated. The dunes are carbonate-rich in the east and center, to grading to quartz-rich to the west. Examining the entire Bight dune systems in a chronological order, the oldest dunes (>164 ka) were located on Kangaroo Island in the far east and are quartzrich, but overlain by subsequent carbonate deposits, which also date >136 ka. Next were dunes deposited during sea-level highstands along the Baxter Cliffs during Marine Isotope Stage (MIS) 5a (similar to 80 ka) and MIS3 with dates between 60 and 40 ka, followed by reactivation during the Last Glacial Maximum (LGM) by strong westerly winds between 26-16 ka, particularly across the Roe Plain and on some Eyre Peninsula headlands. Initial Holocene clifftop emplacement accompanied the sea level transgression and stillstand between 10-6 ka. Most beaches and sand ramps that supplied the dunes have since been eroded, though ongoing reactivation on top of the cliffs has occurred at scattered sites throughout the late Holocene, a fact exacerbated by the general aridity, with some sites showing evidence to two to three reactivations. More dating is required to determine if the reactivation is periodic or more random together with a more complete chronology of the dune systems, including their initial emplacement.
英文关键词	Clifftop dunes; LGM dunes; Great Australian bight; OSL dating
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001178828100001
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/304208
作者单位	University of Sydney; National Institute of Advanced Industrial Science & Technology (AIST); University of New South Wales Sydney; Department for Environment & Water (DEW)
推荐引用方式 GB/T 7714	Short, A. D.,Tamura, T.,Oliver, T. S. N.,et al. Quaternary clifftop and last glacial maximum dunes around the Great Australian Bight[J],2024,327.
APA	Short, A. D.,Tamura, T.,Oliver, T. S. N.,Detmar, S.,&Fotheringham, D..(2024).Quaternary clifftop and last glacial maximum dunes around the Great Australian Bight.QUATERNARY SCIENCE REVIEWS,327.
MLA	Short, A. D.,et al."Quaternary clifftop and last glacial maximum dunes around the Great Australian Bight".QUATERNARY SCIENCE REVIEWS 327(2024).