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The Australian plate then to the south starts subducting under the Pacific plate at a rate of 3.6 cm/year (1.4 in/year) at the Puysegur Trench, [6] which ends in the south as a long series of transform faults between the two plates called the Macquarie Ridge Complex, commencing with the McDougall Fault Zone and ending with the Macquarie Fault ...
Indo-Australian plate – Major tectonic plate formed by the fusion of the Indian and Australian plates (sometimes considered to be two separate tectonic plates) – 58,900,000 km 2 (22,700,000 sq mi) Australian plate – Major tectonic plate separated from Indo-Australian plate about 3 million years ago – 47,000,000 km 2 (18,000,000 sq mi)
The Pacific plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million km 2 (40 million sq mi), it is the largest tectonic plate. [2] The plate first came into existence as a microplate 190 million years ago, at the triple junction between the Farallon, Phoenix, and Izanagi plates. The Pacific plate subsequently grew ...
The oceanic Australian plate is subducted beneath the continental Sunda plate along the Sunda Trench. The oceanic Solomon Sea plate is subducting beneath the South Bismarck plate and the New Hebrides plate driven by the mutual movements of the Australian and Pacific plates and local spreading centres.
The Pacific plate sinks below the Australian plate and forms the Kermadec Trench and the island arcs of Tonga and Kermadec. New Zealand is situated along the southeastern boundary of the plate, which with New Caledonia makes up the southern and northern ends of the ancient landmass of Zealandia , which separated from Australia 85 million years ago.
The Macquarie triple junction is a geologically active tectonic boundary located at 3] at which the historic Indo-Australian plate, Pacific plate, and Antarctic plate collide and interact The term triple junction is given to particular tectonic boundaries at which three separate tectonic plates meet at a specific, singular location.
The Tonga plate begins 2,500 km (1,600 mi) NNE of New Zealand and stretches northward, [4] until the plate ends bounded by the Niuafo'ou plate to the northwest and the Pacific plate to the northeast. The Hikurangi Margin is the extension of the Kermadec–Tonga subduction zone further south down the east coast of the North Island.
The Tasman Sea, and part of Zealandia then locked together with Australia to form the Australian Plate (40 Ma), and a new plate boundary was created between the Australian Plate and Pacific Plate. Zealandia ended up at a pivot point between the Pacific and Australian Plates, with spreading in the south, and convergence in the north, where the ...