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1. Site U1460

   https://doi.org/10.14379/iodp.proc.356.105.2017  

   Gallagher, SJ; Fulthorpe, CS; Bogus, K; Auer, G; Baranwal, S; Castañeda, IS; Christensen, BA; De_Vleeschouwer, D; Franco, DR; Groeneveld, J; et al (February 2017, Proceedings of the International Ocean Discovery Program Expedition reports)

   International Ocean Discovery Program (IODP) Site U1460 lies in the northern part of the Perth Basin, about 18 nmi north of IODP Site U1459 and ~150 m from the Morangie-1 industry well on the Carnarvon ramp (James et al., 1999; Collins et al., 2014). Site U1460 is north of the Houtman Abrolhos main reef complex, which contains the most southerly tropical reefs in the Indian Ocean (Figures F1, F2, F3). 

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2. Site U1462

   https://doi.org/10.14379/iodp.proc.356.107.2017  

   Gallagher, SJ; Fulthorpe, CS; Bogus, K; Auer, G; Baranwal, S; Castañeda, IS; Christensen, BA; De_Vleeschouwer, D; Franco, DR; Groeneveld, J; et al (February 2017, International Ocean Discovery Program)

   International Ocean Discovery Program (IODP) Site U1462 is 50 km north of the Montobello Islands in the Northern Carnarvon Basin, ~150 m from the Fisher-1 industry well (Figures F1, F2). Site U1462 is on the outer edge (87 m water depth) of a middle ramp (James et al., 2004). The seabed in the region is carbonate-rich (>90%) gravel and sand with minor mud (Jones, 1973; James et al., 2004). Coring at Site U1462 targeted a sequence of shelfal to shelf-edge carbonates that overlie a Miocene sand unit (the Bare Formation) (Figure F3). 

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3. Site U1461

   https://doi.org/10.14379/iodp.proc.356.106.2017  

   Gallagher, SJ; Fulthorpe, CS; Bogus, K; Auer, G; Baranwal, S; Castañeda, IS; Christensen, BA; De_Vleeschouwer, D; Franco, DR; Groeneveld, J; et al (February 2017, International Ocean Discovery Program)

   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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4. Site U1557

   Coggon, R.M. Sylvan; Sylvan, J.B.; Estes, E.R.; Teagle, D.A.H.; Reece, J.; Williams, T.J.; Christeson, G.L.; Aizawa, M.; Borrelli, C.; Bridges, J.D.; et al (January 2024, Proceedings of the International Ocean Discovery Program Expedition reports)

   Site U1557 (30°56.4651′S, 26°37.7892′W, proposed Site SATL-56A) is in the central South Atlantic Ocean at a water depth of ~5011 meters below sea level (mbsl) ~1243 km west of the Mid-Atlantic Ridge (see Figure F1 and Tables T1, T2, all in the Expedition 390/393 summary chapter [Coggon et al., 2024d]) on crust that formed at a slow half spreading rate of ~13.5 mm/y, which is the slowest spreading rate in the study region (Kardell et al., 2019; Christeson et al., 2020) (see Figure F7 in the Expedition 390/393 summary chapter [Coggon et al., 2024d]; Reece et al., 2016; Reece and Estep, 2019). With an estimated age of 60.7 Ma, Site U1557 is just about the oldest location of the South Atlantic Transect (SAT) campaign (International Ocean Discovery Program [IODP] Expeditions 390C, 395E, 390, and 393). Site U1557 is more heavily sedimented than Site U1556, which is located 6.5 km west of Site U1557 on 61.2 Ma ocean crust. Together, both sites allow for investigation of the effect of sediment thickness on crustal evolution. 

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5. Site U1561

   Coggon, R.M.; Sylvan, J.B.; Estes, E.R.; Teagle, D.A.H.; Reece, J.; Williams, T.J.; Christeson, G.L.; Aizawa, M.; Borrelli, C.; Bridges, J.D.; et al (January 2024, Proceedings of the International Ocean Discovery Program Expedition reports)

   Site U1561 (30˚43.2902′S, 26˚41.7162′W; proposed Site SATL-55A) is in the central South Atlantic Ocean at a water depth of 4910 meters below sea level (mbsl) ~1250 km west of the Mid-Atlantic Ridge (see Figure F1 and Tables T1, T2, all in the Expedition 390/393 summary chapter [Coggon et al., 2024d]) on crust that formed at a slow half spreading rate of ~13.5 mm/y, which is the slowest spreading rate in the study region (Kardell et al., 2019; Christeson et al., 2020; see Figure F7 in the Expedition 390/393 summary chapter [Coggon et al., 2024d]). With an estimated age of 61.2 Ma, Site U1561 is the oldest location of the South Atlantic Transect (SAT) campaign (International Ocean Discovery Program [IODP] Expeditions 390C, 395E, 390, and 393). Site U1561 sits on a basement ridge and is therefore less heavily sedimented than Sites U1556 and U1557, which are located ~25 km south of Site U1561 on 61.2 and 60.7 Ma ocean crust, respectively. Together, all sites in this region allow for investigation of the effect of sediment thickness on crustal evolution. 

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