New Hebrides Plate

The New Hebrides Plate, sometimes called the Neo-Hebridean Plate, is a minor tectonic plate located in the Pacific Ocean near the island nation of Vanuatu. The plate is bounded on the southwest by the Indo-Australian Plate which is subducting below it. The New Hebrides Subduction Zone is extremely active, producing over 20 earthquakes of magnitude 7 or higher in just the past 25 years.

New Hebrides Plate map-fr
Map of the New Hebrides Plate ("Nouvelles Hébrides") and its neighboring plates (in French)

See also

References

  • Calmant, S.; Pelletier, B.; Lebellegard, P.; Bevis, M.; Taylor, F. W.; Phillips, D. A. (2003). "New insights on the tectonics along the New Hebrides subduction zone based on GPS results". J. Geophys. Res. 108 (B6): 2319. Bibcode:2003JGRB..108.2319C. doi:10.1029/2001JB000644.
Balmoral Reef Plate

The Balmoral Reef Plate is a small tectonic plate (microplate) located in the south Pacific north of Fiji. Clockwise from the north, it borders the Pacific Plate, Australian Plate, Conway Reef Plate, and the New Hebrides Plate. The northern and western borders are a divergent boundary while the rest of the borders are transform and convergent boundaries. The Balmoral Reef Plate's ocean crust is less than 12 million years old and is spreading between the New Hebrides and Tonga subduction.

Conway Reef Plate

The Conway Reef Plate is a small tectonic plate (microplate) located in the south Pacific west of Fiji. It is bounded on the east and west by convergent boundaries, the western boundary is with the New Hebrides Plate while the eastern is with the Australian Plate. A short transform boundary also exists with the Balmoral Reef Plate.

Geology of the Pacific Ocean

The Pacific Ocean evolved in the Mesozoic from the Panthalassic Ocean, which had formed when Rodinia rifted apart around 750 Ma. The first ocean floor which is part of the current Pacific Plate began 160 Ma to the west of the central Pacific and subsequently developed into the largest oceanic plate on Earth.The tectonic plates continue to move today. The slowest spreading ridge is the Gakkel Ridge on the Arctic Ocean floor, which spreads at less than 2.5 cm/year (1 in/year), while the fastest, the East Pacific Rise near Easter Island, has a spreading rate of over 15 cm/year (6 in/year).

List of tectonic plates

This is a list of tectonic plates on the Earth's surface. Tectonic plates are pieces of Earth's crust and uppermost mantle, together referred to as the lithosphere. The plates are around 100 km (62 mi) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium). The composition of the two types of crust differs markedly, with mafic basaltic rocks dominating oceanic crust, while continental crust consists principally of lower-density felsic granitic rocks.

Lopevi

Lopevi (or Lopévi) is an uninhabited island in Malampa Province, Vanuatu. It lies to the southeast of Ambrym and east of Paama.

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