Amsterdam-St. Paul Plateau is located in which one of the following oceanic regions ?

The correct answer is C, Southern Indian Ocean. The Amsterdam-St. Paul Plateau is a raised area of the ocean floor in the southern Indian Ocean, named after the French islands of Amsterdam and Saint-Paul that rise from it. The plateau sits on the Southeast Indian Ridge, the mid-ocean ridge where the Australian and Antarctic plates move apart. A hotspot beneath it has added extra volcanic material, so the crust there is thicker and shallower than the surrounding ridge, and the two volcanic islands are its peaks above sea level. Along with Kerguelen, Crozet and the Mascarene Plateau, it is one of the well-known submarine plateaus of the Indian Ocean. Option A is wrong because the Arctic Ocean's major features are the Lomonosov Ridge and the Siberian shelf. Option B is wrong because the North Atlantic has features such as the Rockall and Porcupine banks, not this plateau. Option D is wrong because the South Pacific has the East Pacific Rise and the Campbell Plateau instead. Exam tip: Indian Ocean plateaus = Kerguelen, Crozet, Mascarene, Amsterdam-St. Paul; all lie in its southern or western half.