Figure 15. (a) UTIG north-south line VB in the Mona Passage area, where a regional arch is present and normal faults modify the arch along its northern and southern flanks. Similar normal faults are present on the north flank of the arch as seen in lines 29 and 30 in Figure 16. Interpretation of UTIG line VB. Inset shows location of UTIG line VB.