Figure F11. Depth versus time predicted for drilling and wireline logging operations for Expeditions 309 and 312. Black line = depth of Hole 1256D before operations during Expedition 309. Horizontal lines = range of depths at which axial low-velocity zones, now frozen as gabbros, should be present, assuming 300 m of off-axis lavas (see Table T1). RCB = rotary core barrel.