Site summaries (continued)

Site NWS-2A

Priority: Primary
Position: 18.9653°S, 117.6237°E
Water depth (m): 141
Target drilling depth (mbsf): 530
Approved maximum penetration (mbsf): 530
Survey coverage (track map; seismic profile): Track map (Fig. AF11)
Seismic profile (Fig. AF12)
Objective(s): The Pliocene–Pleistocene section may yield a tropical/subtropical carbonate record that may allow us to determine the subsidence, interglacial Australian monsoon, and tropical shelf edge oceanographic histories of the region. Oolitic facies may be present, and determining the age of these highly diagnostic tropical and paleodepth indices at this site may reveal their oldest occurrence in the Indian Ocean, enhancing our understanding of the onset of aridity in this region.
Drilling program: Triple APC, double XCB
Logging program or downhole measurements program: Triple combo, FMS, VSP
Nature of rock anticipated: Calcilutites, calcarenites