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(decgrees C) split core orientation instrument code 2 9 A 1 6 30.0 30.0 678.60 686.40 sonic_velocity NO EARMUFF DEVICE 2 9 A 1 6 60.0 60.0 678.60 686.70 sonic_velocity NO EARMUFF DEVICE