Fig. 4

Interpreted seismic depth sections showing blow-ups from the top of DWV1. Numbers correspond to seismic units. Units 5b and 5c are separated by an upwards concave unconformity, interpreted as a crater. The upper boundary of 5c is upwards convex, interpreted as a lava cap. Internal unconformity within Unit 5c (b) are marked as thin red lines. Arrows mark the crossing points of (a) and (b). For uninterpreted sections, see Supplementary Fig. S4.