气候变化领域集成服务门户(CCPortal): Migration of Pleistocene shorelines across the Palaeo-Agulhas Plain: Evidence from dated sub-bottom profiles and archaeological shellfish assemblages

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DOI	10.1016/j.quascirev.2019.106107
	Migration of Pleistocene shorelines across the Palaeo-Agulhas Plain: Evidence from dated sub-bottom profiles and archaeological shellfish assemblages
	Cawthra H.C.; Anderson R.J.; De Vynck J.C.; Jacobs Z.; Jerardino A.; Kyriacou K.; Marean C.W.
发表日期	2020
ISSN	0277-3791
卷号	235
英文摘要	Intertidal zones on shorelines are geologically complex features of the coastal plain, shaped by heterogeneous substrate lithologies. Palaeocoastlines have been heavily modified by sea-level change, ocean currents, wind, waves and swell. Rocks and sediments along intertidal zones create rich habitats for biogenic forms including shellfish, which are highly sensitive to subtle variations in underlying lithology. Here, we assess Pleistocene shoreline migrations on the south coast of South Africa in relation to fluctuating sea-levels and changes in sediment supply. The study area extends from Still Bay to Mossel Bay, South Africa, with a particular focus on Pinnacle Point. Our goal is to better understand the changes to the intertidal zone along these palaeocoastlines and how this may have affected marine resources available to early humans. We interpret marine geological records at select time slices along sub-bottom profiled transects that run perpendicular to the coast. We describe the character of specific shorelines to establish expectations of coastline character which we then compare to archaeological records at Pinnacle Point. We base our interpretations on (1) significant events in Pleistocene glacio-eustatic and depositional records, such as widespread deposition of coastal sand dunes at ∼90, ∼74 and ∼50 ka [MIS 5e–MIS 4], and (2) empirical evidence from high-resolution records of shellfish assemblages at the archaeological sites of PP13B and PP5-6. We demonstrate a prevalence of dissipative beaches and mixed coasts on Pleistocene sea-level lowstands on the coast of the Palaeo-Agulhas Plain. This differs significantly from the modern coastline with its significance of rocky shorelines. © 2019 Elsevier Ltd
英文关键词	Archaeological shellfish; Coastal geomorphology; Human subsistence; Palaeo-Agulhas Plain; Pleistocene; Seismic profiling; South Africa
语种	英语
scopus关键词	Coastal zones; Deposition; Landforms; Lithology; Marine biology; Ocean currents; Sea level; Human subsistence; Palaeo-Agulhas Plain; Pleistocene; Seismic profiling; South Africa; Shellfish; archaeology; biogenic material; coastal plain; fossil assemblage; intertidal environment; marine isotope stage; marine resource; oceanic current; Pleistocene; sea level change; sedimentation; shellfish; shoreline change; wind wave; Agulhas Plain; Mossel Bay; Pinnacle Point; South Africa; South Africa; Still Bay; Western Cape
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/151507
作者单位	Geophysics and Remote Sensing Unit, Council for Geoscience, PO Box 572, Bellville, 7535, South Africa; African Centre for Coastal Palaeoscience, Nelson Mandela University, PO Box 77000, Port Elizabeth, Eastern Cape 6031, South Africa; Department of Biological Sciences, University of Cape Town, Rondebosch, 7701, South Africa; Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, PO Box 872402, Tempe, AZ 85287-2402, United States; Centre for Archaeological Science, School of Earth and Environmental Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Department of Anthropology and Archaeology, School of Humanities, University of South Africa, UNISA, P O Box 3920003, South Africa; Palaeo-Research Institute, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
推荐引用方式 GB/T 7714	Cawthra H.C.,Anderson R.J.,De Vynck J.C.,et al. Migration of Pleistocene shorelines across the Palaeo-Agulhas Plain: Evidence from dated sub-bottom profiles and archaeological shellfish assemblages[J],2020,235.
APA	Cawthra H.C..,Anderson R.J..,De Vynck J.C..,Jacobs Z..,Jerardino A..,...&Marean C.W..(2020).Migration of Pleistocene shorelines across the Palaeo-Agulhas Plain: Evidence from dated sub-bottom profiles and archaeological shellfish assemblages.Quaternary Science Reviews,235.
MLA	Cawthra H.C.,et al."Migration of Pleistocene shorelines across the Palaeo-Agulhas Plain: Evidence from dated sub-bottom profiles and archaeological shellfish assemblages".Quaternary Science Reviews 235(2020).