SEDIMENTS

One wash barrel was recovered from Hole 1163A (Core 187-1163A-1W; 0.0-161.0 mbsf). The entire core is clay of varying color, but the boundaries and the thicknesses of these intervals are unknown. All intervals in this core contain abundant carbonate, as evidenced by their reaction with dilute HCl (~5%-10%). From 0 to ~10 cm in Section 187-1163A-1W-1 is a soupy, very light cream-colored ooze. From ~10 to 99 cm is a light greenish gray, moderately stiff clay. The upper contact of this interval is severely drilling disturbed and smeared over 15 cm, but the lower contact is sharp and irregular. From 99 to 105 cm is a pale cream clay, and from 105 to 133 cm is a very light brown clay with rare 1- to 3-cm-thick layers and lenses of light brown clay. The contacts of the layers and lenses are sharp and irregular. From 133 to 136 cm is a thin interval of medium brown clay, underlain by an interval of layered, very light brown to medium brown clay. This interval extends through Section 187-1163A-1W-2 to the top 4 cm of the core catcher. The layers range from 1 mm to 3 cm thick and have predominantly sharp but irregular contacts. A few layer contacts are diffuse, but this may be an artifact of the coring or splitting process. From 4 to 13 cm in Section 187-1163A-1W-CC is a medium brown, drilling-disturbed clay. A single fragment of basalt with fresh glass was embedded in a thin (4 cm) interval of severely drilling-disturbed light brown clay at the base of the core catcher.

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