leg site hole core section top interval depth (cm) bottom interval depth (cm) top of core depth (m) sample depth (m) sonic velocity (km/sec)temperature(degrees C) split core orientation instrument code 70 508 B 3 1 10.0 10.0 51.50 51.60 4.748 NO HAMILTON FRAME 70 508 B 4 1 3.0 3.0 57.50 57.53 5.407 NO HORIZONTAL HAMILTON FRAME