167 Prospectus

SITE CA-15A

LOCATION:  Tanner Basin, California Borderlands

PRIORITY:  1

POSITION:  32° 50.01' N 119° 58.921' W (cross of EW9504  CA-15 lines 4 and 6; 
EW9504 CA15 shotpoint 3130)

WATER DEPTH:  1182 m

SEDIMENT THICKNESS:  >1.0 sec (800 m)

TOTAL PENETRATION:  400 m

SEISMIC COVERAGE:  EW9504 CA15 survey; miscellaneous regional.

OBJECTIVES:  Coastal Transect, Conception transect, southern depth transect. 
 We believe that this site should be older than CA-9 and will provide 
a shallow site for the Conception transect. We plan to sample upper
 Miocene to Holocene sediments for paleoceanographic studies of the
 evolution of the California Current and north Pacific water masses.

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, FMS, and geochemical
 logging strings. GHMT magnetic logging if sediments appear feasible
from core samples.

NATURE OF ROCK ANTICIPATED:  Hemipelagic sediments over middle Miocene synrift 
sediments.

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