Logging data showing the inferred top depth of the 10¾ inch casing string in Hole U1380C.  The logged density curves display step changes at the base of the 16 inch casing (50 mbsf) and at the top of the of 10¾ inch casing string, estimated to be at ~65 mbsf.  The density measurement was taken inside the drill pipe, and the density spikes mark drill pipe joints spaced every ~9.5 m.