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      Site U1464: Expedition 356

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          Abstract

          At 270 m water depth, International Ocean Discovery Program (IODP) Site U1464 is currently in an outer ramp setting, ~50 km southeast of the Rowley Shoals. The seabed in the vicinity of the site is poorly sorted, carbonate-rich (>90%) sediment made up of bioclastic gravel, sand, and mud. Site U1464 is 5 km updip from a drowned “fossil” shoal described by Jones (1973) and Ryan et al. (2009) and is connected to the site by parallel laterally persistent reflectors on seismic Profile JN87-07. Therefore, improved ages for these reflectors may allow us to date the initiation and demise of this reef/shoal. The proximity of Site U1464 to a previously identified drowned shoal makes this site unique and significant. Stratigraphic data and paleobathymetric determinations obtained will allow robust estimates of the subsidence history of this part of the northwest shelf and its role in carbonate platform drowning. As the most northern site of the Expedition 356 coring transect, the sediment and biota at Site U1464 are likely to record strong Western Pacific Warm Pool and Indonesian Throughflow signals vital to understanding the (geo)history of these important oceanic features. The strata of this site should also contain a Pliocene–Pleistocene record of the Australian monsoon and aridity.

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          Most cited references15

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          Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale

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                Author and article information

                Journal
                10.14379/iodp.proc.356.2017
                Proceedings of the International Ocean Discovery Program
                International Ocean Discovery Program
                2377-3189
                26 February 2017
                Article
                10.14379/iodp.proc.356.109.2017
                9a13e8d0-5f33-42b8-82a7-bdcc93306a33

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                History

                Earth & Environmental sciences,Oceanography & Hydrology,Geophysics,Chemistry,Geosciences

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