Site summaries (continued)

Site NWS-7A

Priority: Alternate
Position: 18.0652°S, 118.6313°E
Water depth (m): 260
Target drilling depth (mbsf): 840
Approved maximum penetration (mbsf): 840
Survey coverage (track map; seismic profile): Track map (Fig. AF11)
Seismic profile (Fig. AF15)
Objective(s): An alternate to Site NWS-1A, this northernmost site targets the tropical to subtropical transition from the Pliocene to the Pleistocene updip from a drowned fossil reef. Improved ages for these reflectors will allow us to date this reef. The strata at this site may yield an interglacial record of the Australian monsoon. In addition, paleobathymetric analyses may shed light on the nature of the subsidence that drowned the nearby reef.
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