John Seach, Volcano Live

 Slab Rollback and Backarc Spreading - John Seach

Slab rollback is a geologic term which refers to the process where a sinking tectonic slab
subducts at a steep angle and sweeps back through the mantle like a paddle.
This causes the hinge to migrate away from the arc region. The upper plate is pulled along
in the process and may lead to backarc spreading.

Slab Rollback and Backarc Spreading
Copyright John Seach