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International Ocean Discovery Program (IODP) Site U1461 is 100 km northwest of Barrow Island in the Northern Carnarvon Basin, ~150 m from the West Tryal Rocks-2 industry well (Figure F1). Site U1461 is on the shelf edge of an outer ramp (James et al., 2004). The seabed in the region is poorly sorted carbonate-rich (>90%) sediment made up of bioclastic gravel, sand, and mud (Jones, 1973; James et al., 2004). Coring at Site U1461 targeted a 1 km thick outer shelf to upper slope carbonate wedge that onlaps (because of basin-wide subsidence) a regional top Miocene surface (Figures F2, F3).
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Site U1464
At 270 m water depth, International Ocean Discovery Program (IODP) Site U1464 is currently in an outer ramp setting (James et al., 2004), ~50 km southeast of the Rowley Shoals (Figures F1, F2). The seabed in the vicinity of the site is poorly sorted, carbonate-rich (>90%) sediment made up of bioclastic gravel, sand, and mud (Jones, 1973; James et al., 2004). 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 (Figure F3). Therefore, improved ages for these reflectors may allow us to date the initiation and demise of this reef/shoal.
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- Award ID(s):
- 1326927
- PAR ID:
- 10578934
- Author(s) / Creator(s):
- ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »
- Publisher / Repository:
- International Ocean Discovery Program
- Date Published:
- Volume:
- 356
- Issue:
- 109
- ISSN:
- 2377-3189
- ISBN:
- 978-1-954252-49-3
- Subject(s) / Keyword(s):
- International Ocean Discovery Program IODP Expedition 356 JOIDES Resolution Site U1464 Roebuck Basin Indonesian Throughflow Miocene Pliocene Pleistocene Australian monsoon subsidence aridity anhydrite sabkha reefs Rowley Shoals tropical carbonates
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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- Free Publicly Accessible Full Text
-
Accepted Manuscript1.0
- Book Chapter:
- https://doi.org/10.14379/iodp.proc.356.109.2017
