Figure F3. Regional cross section through time across Site 1168, from Tasmania southwest to the abyssal plain, based on seismic profile SO36-47 and other geological information. Note the development of ridges by northwest-southeast strike-slip motion between Australia and Antarctica during the Paleocene, the Eocene departure of Antarctica by strike-slip motion and emplacement of oceanic crust, and the Oligocene collapse of the margin. Cape Sorell drill site No. 1 is located at shallow depth on the transect. TWT = two-way traveltime.