Site 584

Abstract

Time on bole: 85 hr., 30 min. Position (latitude; longitude): 40°28.0'N; 143°57.1'E Water depth (sea level; corrected m, echo-sounding): 4078 Water depth (rig floor; corrected m, echo-sounding): 4088 Bottom felt (rig floor; m, drill pipe): 4124 Penetration (m): 941.0 Number of cores: 98 Total length of cored section (m): 941.0 Total core recovered (m): 478.7 Core recovery (%): 51 Oldest sediment cored: Depth sub-bottom (m): 941.0 Nature: Mudstone Age: early middle Miocene Measured velocity (km/s): V p = 2.00 (at 932 m sub-bottom) Time on hole: 10 hr., 24 min. Position (latitude; longitude): 40 c 28.0'N; 143°57.6'E Water depth (sea level; corrected m, echo-sounding): 4094 Water depth (rig floor; corrected m, echo-sounding): 4104 Bottom felt (rig floor; m, drill pipe): 4125 Penetration (m): 901.5 Kagami, H., Karig, D. E., Coulbourn, W. T, et al., Init. Repts. DSDP, 87: Washington (U.S. Govt. Printing Office). Total length of cored section (m): 28.9 Total core recovered (m): 10.66 Core recovery (%): 37 Oldest sediment cored: Depth sub-bottom (m): Core H4 (804.8 to 901.5 m sub-bottom) Nature: Mudstone Age: early middle Miocene Measured velocity (km/s): V p = 1.86 (at 796 m sub-bottom) Time on hole: 13 hr., 42 min. Position (latitude; longitude): 40°28.0'N; 143°56.7'E Water depth (sea level; corrected m, echo-sounding): 4086 Water depth (rig floor; corrected m, echo-sounding): 4096 Bottom felt (rig floor; m, drill pipe): 4152 Penetration (m): 954 Number of cores: 3 Total length of cored section (m): 22 Total core recovered (m): 11.89 Core recovery (%): 54 Oldest sediment cored: Depth sub-bottom (m): 954 Nature: Paisley mudstone Age: early middle Miocene Principal results: See Summary and Conclusions section.