Site summaries (continued)

Site NWS-10A

Priority: Alternate
Position: 20.5555°S, 114.8777°E
Water depth (m): 200
Target drilling depth (mbsf): 1055
Approved maximum penetration (mbsf): 1055
Survey coverage (track map; seismic profile): Track map (Fig. AF6)
Seismic profile (Fig. AF7)
Objective(s): This site is an alternate to Site NWS-4A. The primary objective is to obtain an orbital-scale record of climate variability and monsoon history comparable in its resolution to other global climate proxy records. Pollen is likely to be abundant, delivered by fluvial outflow during the rainy season. This location is also close to the southern edge of Australian monsoonal influence and can therefore be used to chart its latitudinal variability. Marine microfossil paleoproductivity analyses may also reveal the dominance of the West Australian Current over the Leeuwin Current during glacial periods. The site is downdip from a tropical ramp and directly underneath the path of the Leeuwin Current. Therefore, the section may also be used to chart tropical oceanographic variability on an orbital scale.
Drilling program: Triple APC, double XCB followed by RCB to total depth
Logging program or downhole measurements program: Triple combo, FMS, VSP
Nature of rock anticipated: Calcilutites, calcarenites