Color version of Figure 5d, located in Figure 3. Line 78 is shown interpreted in the published article. Line 77 is shown as black and white seismic with color interpretation because the color amplitude did not look so good because of low signal to noise (related to ice conditions). The free air gravity shows a high within outer Colbeck Trough. The northern part of Colbeck Trough affects only undeformed late Oligocene and younger strata and therefore its position is not controlled in this area by rift structure. Vertical exaggeration is about 7 times at the seafloor in the .pdf version of this figure.