Site summaries (continued)

Site NWS-8A

Priority: Alternate
Position: 18.9122°S, 117.5838°E
Water depth (m): 160
Target drilling depth (mbsf): 530
Approved maximum penetration (mbsf): 530
Survey coverage (track map; seismic profile): Track map (Fig. AF11)
Seismic profiles (Figs. AF12, AF13)
Objective(s): This site is an alternate to Site NWS-2A. The Pliocene–Pleistocene section may yield a tropical/subtropical carbonate record to help determine the subsidence, interglacial Australian Monsoon, and tropical shelf edge oceanographic histories of the region. Oolitic facies may be present in this section, and determining the age of these highly diagnostic tropical and paleodepth indices 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