OCEAN-OCEAN CONVERGENCE

(JAPAN, ALEUTIANS, MARIANA)

COLD, DENSE SUBDUCTING SLAB CHARACTERIZED BY HIGH SEISMIC VELOCITY AND EARTHQUAKES, CAN EXTEND TO 700 KM

LARGE THRUST EARTHQUAKES OCCUR AT PLATE INTERFACE

VOLCANIC ISLAND ARC FORMS

BACK-ARC SPREADING CAN FORM MARGINAL SEA

(SEA OF JAPAN)