Schematic (IMAGE)
Caption
This is a schematic showing how subduction drives the 'Tethyan One-way Train' between terminals of Gondwana and Eurasia. a. After consumption of mid-ocean ridge, subduction dragging causes the rift of the rear continent. b. Drifts of the detached continent will finally collide toward the subduction-directed continent, and then continental collision induces subduction initiation in a new ocean. Since the oceanic subduction initiation, the mid-ocean ridge will be consumed towards the subduction direction then repeat the process of 'a'. The light to dark belt represents oceanic crust with ages from young to old.
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