Site: APSHE-15A

Priority: 2 (alternate to APSHE-13A)
Position: 64°56.68'S, 64°18.92'W
Water Depth: 1445 m
Sediment Thickness: ~200 m
Approved Maximum Penetration: 250 mbsf
Seismic Coverage: On Site: Lines AI97-H219G SP 1962 and AI97-H221 SP 800 (G.I. Gun source). Intersection on site: Line AI97-H228 SP 698 (water gun source). PD92-2 Huntec D-TB 540J survey.

Objectives: The objectives of Site APSHE-15A are to:

1. Obtain a Holocene ultra-high-resolution record of paleoproductivity in an inner shelf basin.

2. Examine decadal-millennial variability to compare with low-latitude and ice-core records.

3. Test the hypothesis that Palmer Deep was a subglacial lake during the latest episodes of ice grounding on the Antarctic Peninsula continental shelf.

Drilling Program: Quadruple APC coring to base of transparent unit. XCB coring into the lower unit.

Logging and Downhole Operations: None

Nature of Rock Anticipated: Pelagic/hemipelagic siliceous ooze and mud, with <1% ice-rafted component (??diamicton at base).

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