Figure 15. Evolutionary model showing map view and two cross sections modified from working model proposed by Platt and Vissers (compare with convective removal model shown in Figure 14) to explain results from this tomography study and Platt et al.'s more recent results. Thick dashed lines show suggested position for connection of delaminated lithosphere to surface lithosphere. G.B., Guadalquivir Basin. Circles show locations of present subcrustal seismicity. Note the body shown in the upper mantle in the "Present" panel of BB' is attached to Iberia to the west of the cross section. Patterns are the same as those shown in Figures 2 and 14. The crooked arrows shown in the Strait of Gibraltar mark the relative motion of Africa to Iberia remaining before present.