As the descending plate bends downward, a long, steep, narrow depression in the seafloor where one plate sinks under another plate may develop; this is called a(an).

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Revolt · Accepted Answer

ocean trench

Convection and Mantle

As the descending plate bends downward, a long, steep, narrow depression in the seafloor where one plate sinks under another plate may develop; this is called a(an).