Biostratigraphic evidence for dramatic Holocene uplift of Robinson Crusoe Island , Juan Fernández Ridge , SE Pacific Ocean

Content Provider	Semantic Scholar
Author	Sepulveda, Pablo Roux, Julien Lara, Luis Enrique Astudillo, Vladimir
Copyright Year	2015
Abstract	11 A study of the biostratigraphy and sedimentology of Holocene deposits on Robinson 12 Crusoe Island (RCI) on the Juan Fernández Ridge (JFR) indicates that a dramatic but 13 localized uplift occurred since 8,000 BP, at a rate of about 8.5 mm/yr. In fact, supratidal 14 flats and sand layers with marine gastropods (mostly Nerita sp.) are now exposed ca. 70 m 15 a.s.l., and covered by transitional dunes. The last volcanic activity on RCI occurred at ca. 16 0.8 Ma (active hotspot located 280 km further west) and there is no sign of a compensating 17 bulge that explains this uplift, isobaths of the sea floor instead suggesting general 18 subsidence. However, modeling indicates that large-scale landslides followed by isostatic 19 rebound are a viable explanation, partially reflected in the low-resolution bathymetry of the 20 area. 21
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Alternate Webpage(s)	https://www.biogeosciences.net/12/1993/2015/bg-12-1993-2015.pdf
Alternate Webpage(s)	https://www.biogeosciences.net/12/1993/2015/bg-12-1993-2015-supplement.pdf
Alternate Webpage(s)	http://www.biogeosciences.net/12/1993/2015/bg-12-1993-2015-supplement.pdf
Language	English
Access Restriction	Open
Subject Keyword	Alveolar Ridge Augmentation Bathymetry Circa Command & Conquer:Yuri's Revenge CpG Islands Earth bulge Gastropoda Genetic Hotspot Journal of Formalized Reasoning Landslides Marine Organisms No symbol Pony Island Ridge detection Transmeta Crusoe anatomical layer
Content Type	Text
Resource Type	Article