Figure 1 : A perennial plate tectonic map.

From: Lasting mantle scars lead to perennial plate tectonics

Figure 1

Present-day plate boundaries with major paleo-suture zones and regions of ML scars. Yellow lines are regions of proposed ancient suture zones as compiled from Burke et al.46 and Hoffman et al.47. Yellow crosses indicate seismic surveys where mantle reflections have been reported, with locations here given by a previous compilation of mantle heterogeneities1 and two recent studies6,48. Present-day plate boundaries are white lines as compiled from Bird49.