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 54 420 A 1 3 13.0 13.0 0.00 3.13 1.490 23.0 YES HAMILTON FRAME 54 420 A 1 3 128.0 128.0 0.00 4.28 1.520 23.0 YES HAMILTON FRAME