leg site hole well logging latitude longitude ocean ocean hemisphere sea physographic feature hard rock feature ta td re-entry site survey site termination crust equipment test heat flow in situ pore water hydraulic piston core variable length hpc pressure core barrel punch core extended core barrel water depth(m) total penetration(m) drilled penetration(m) cored penetration(m) number of cores recovered meters recovered percent recovery meters of hard rock cored number of hard rock cores meters of hard rock recovered depth to basememnt(m) oldest sediment sub-bottom depth oldest sediment depth below sealevel oldest sediment core number oldest sediment age oldest sediment lithology oldest sediment lithology composition oldest sediment source oldest sediment heterogeneity oldest sediment hardness oldest comp1 oldest comp2 hard rock descriptions and comments 59 448 A NO 16.3410 134.8742 PACIFIC NORTH PHILIPPINE RIDGE SILL 02/18/1978 02/26/1978 NO YES CHIEF SCIENTIST DECISION OCEANIC NO NO NO NO NO NO YES NO 3483 914 447 467 66 215 46 381 57 165 290.0 3773 9 NO AGE GIVEN NANNOFOSSIL CHALK unk - 0000 unk - 0000 MASSIVE APHYRIC BASALT SILL