4-3. Southeast of Hawaii (PC-11and PC-12) 　　　　　　　　　　

Objectives
PC11 and PC12 were sampled to better understand the timing of Hilina slump and Kilauea events. Results from two previous cores PC5 and PC6, taken in the area during the 1998 cruise, can be found in Kanamatsu et al. (2001) and Naka et al. (2001). The position of PC11 was designed to fill the gap between PC5 and PC6; it is located 200 km SE of Hawaii along the line of the earlier cores. The topography of the region is characterized by a horst-graben structure. PC11 was taken atop a horst, perhaps subduing sedimentation rates and thus permitting the recovery of a longer time sequence in the core. PC12was taken along the same line at a distance of ~325 km from Hawaii island. It is located in a small graben.

Lithology
The lithology of sec1- 43cm, sec2 is characterized by diatomaceous clay. Indurate planar-laminated volcanic slit layers are observed in the interval between 81cm-91cm in sec2. Volcanic sand -silt layers are inter-bedded frequently in the moderate yellowish brown clay in the sec 3. The dark brown radiolarian clay (below 24cm sec4), and inclined dark brown radiolarian ooze (below sec6) are bedded below the volcanic sand and moderate brown color clay sequence.

PC12 was taken from a graben, volcanic sand -silt layers are inter-bedded frequently in the moderate yellowish brown clay in the sec 1. Mottled with volcanic sand are observed in sec 2, 3. Slump structure is observed in the sec 3, 4 and 5. Indurate alternation of volcanic silt and clay are in the lower sec 6. The highly fractured sandstone was recovered in the bottom of the core.
　　　　　　　　　　 　　　　　　　　　　　　

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