I. Mesozoic Pacific Oceanic Plateau
Shatsky Rise
Manihiki Plateau
Ontong Java Plateau


II. Tectonics of Mesozoic Pacific Plate
Nosappu Fracture Zone
Hokkaido Trough

III. Topographic expression of trenches of western Pacific
Challenger Deep, South Mariana Trench
Central Mariana Trench
Boso trench triple junction
Japan Trench

IV. Sreading Systems in Indian Ocean
Gulf of Aden
Rodriguez triple junction


[Photo：R/V Hakuho-maru at Papeete, Tahiti ]