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RTDSDP Site 434
 Leg 56
 DSDP Site 435
 DSDP Site 438
 DSDP Site 440
 Leg 87
 DSDP Site 584
 Erimo Seamount
 Kashima Seamount
SNSubmarine depression extending from Kuril Islands along E coast of Hokkaido and E coast of N and central Honshu. This term has multiple hierarchies.