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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 Pacific plate kept growing and lineations south of the Pacific Triangle indicate the Pacific–Phoenix ridge remained a simple N–S trending spreading system 156–120 Ma. Following the formation and break-up of the Ontong Java – Hikurangi – Manihiki large igneous province 120 Ma, however, the Phoenix plate broke into several smaller ...
Pacific plate – Oceanic tectonic plate under the Pacific Ocean – 103,300,000 km 2 (39,900,000 sq mi) South American plate – Major tectonic plate which includes most of South America and a large part of the south Atlantic – 43,600,000 km 2 (16,800,000 sq mi)
Obduction zones occurs when the continental plate is pushed under the oceanic plate, but this is unusual as the relative densities of the tectonic plates favours subduction of the oceanic plate. This causes the oceanic plate to buckle and usually results in a new mid-ocean ridge forming and turning the obduction into subduction. [citation needed]
The magnitudes ranged from 0.2 to 3.2 in 76 events over the course of the 15-day study; however, magnitudes in the region have gone up to a magnitude 6.4 within the last 5 years. Using the locations of these epicentres it is possible to map the Pacific plate boundary along the Dellwood valley where the concentrations of events occur. [4]
The extension in the Lau–Havre basin results in a higher rate of subduction than convergence along the Australian–Pacific plate boundary. The rates of extension, subduction, and convergence all increase northwards in this complex, subduction at a rate of 24–6 cm/year (9.4–2.4 in/year) and extension at a rate of 9.1–15.9 cm/year (3.6 ...
The Galápagos triple junction (GTJ) is a geological area in the eastern Pacific Ocean several hundred miles west of the Galápagos Islands where three tectonic plates – the Cocos plate, the Nazca plate, and the Pacific plate – meet. It is an unusual type of triple junction in which the three plates do not meet at a simple intersection.
The New Hebrides plate, sometimes called the Neo-Hebridean plate, is a minor tectonic plate (just larger than a microplate) located in the Pacific Ocean. [ 4 ] [ 5 ] While most of it is submerged as the sea bottom of the North Fiji Basin , the island country of Vanuatu , with multiple arc volcanoes , is on the western edge of the plate.
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