167 Prospectus

SITE CA-2B

LOCATION:  Delgada Slope, northern California margin

PRIORITY:  1

POSITION:  40° 04.855' N 125° 20.516' W (Cross of W9406 CA2 
line 12 and EW9504 CA2 line 23; EW9504 CA2 shotpoint 859)

WATER DEPTH:  1951 m

SEDIMENT THICKNESS:  0.695 sec (560 m)

TOTAL PENETRATION:  570 m

SEISMIC COVERAGE:  W9406 CA2 survey, EW9504 CA2 survey; miscellaneous regional.

OBJECTIVES:  Gorda Transect, Coastal Transect, northern depth transect. 
1. To sample a complete Neogene section of hemipelagic sediments for 
paleoceanographic reconstruction. 2. Intermediate site for northern 
California depth transect.

DRILLING PROGRAM:  2 APCs to refusal, third APC to 50 m or longer if time
 available. XCB to total penetration, including minor basement sampling.

LOGGING AND DOWNHOLE OPERATIONS: Standard Quad Combo and FMS logging strings. 
GHMT magnetic log if core measurements indicate feasibility. Geochemical
 logging if drilled depth exceeds 400 m.

NATURE OF ROCK ANTICIPATED:  Siliceous hemipelagic sediments with some minor
 turbidites overlying more carbonate-rich deeper section. Andesite
 basement (DSDP 173).

To Site CA-3A

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