High-Viscosity Zone (IMAGE)
Caption
As slabs of Earth's crust decend into the mantle, they encounter a zone about 1,100 kilometers down where the mantle rock abruptly becomes stiffer, flowing less easily. Similarly, rising plumes of molten rock encounter the same layer and have difficulty punching through from below.
Credit
Dan Shim
Usage Restrictions
No restrictions if used in connection with reportage on this discovery.
License
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