Pacific Plate is an oceanic tectonic plate that lies beneath the
Pacific Ocean. At 103 million square kilometres
(40,000,000 sq mi), it is the largest tectonic plate.
Pacific Plate contains an interior hot spot forming the Hawaiian
Hillis and Müller are reported to consider the
Bird's Head Plate
Bird's Head Plate to
be moving in unison with the Pacific Plate. Bird considers them to
2 Paleo-geology of the Pacific Plate
4 External links
The north-eastern side is a divergent boundary with the Explorer
Juan de Fuca Plate
Juan de Fuca Plate and the
Gorda Plate forming respectively
the Explorer Ridge, the
Juan de Fuca Ridge
Juan de Fuca Ridge and the Gorda Ridge. In the
middle of the eastern side is a transform boundary with the North
American Plate along the San Andreas Fault, and a boundary with the
Cocos Plate. The south-eastern side is a divergent boundary with the
Nazca Plate forming the East Pacific Rise.
The southern side is a divergent boundary with the Antarctic Plate
forming the Pacific-Antarctic Ridge.
The western side, the plate is bounded by the
Okhotsk Plate at the
Kuril-Kamchatka Trench and the Japan Trench, forms a convergent
boundary by subducting under the
Philippine Sea Plate
Philippine Sea Plate creating the
Mariana Trench, has a transform boundary with the Caroline Plate, and
has a collision boundary with the North Bismarck Plate.[citation
In the south-west, the
Pacific Plate has a complex but generally
convergent boundary with the Indo-Australian Plate, subducting under
it north of
New Zealand forming the
Tonga Trench and the Kermadec
Alpine Fault marks a transform boundary between the two
plates, and further south the
Indo-Australian Plate subducts under the
Pacific Plate forming the Puysegur Trench. The southern part of
Zealandia, which is to the east of this boundary, is the plate's
largest block of continental crust.
The northern side is a convergent boundary subducting under the North
American Plate forming the
Aleutian Trench and the corresponding
Aleutian Islands.
Paleo-geology of the Pacific Plate
Pacific Plate is almost entirely oceanic crust, but it contains
some continental crust in New Zealand, Baja California, and coastal
Pacific Plate has the distinction of showing one of the largest
areal sections of the oldest members of seabed geology being
entrenched into eastern Asian oceanic trenches. A geologic map of the
Pacific Ocean seabed shows not only the geologic sequences, and
associated Ring of Fire zones on the ocean's perimeters, but the
various ages of the seafloor in a stairstep fashion, youngest to
oldest, the oldest being consumed into the Asian oceanic trenches. The
oldest member disappearing by way of the
Plate Tectonics cycle is
Cretaceous (145 to 137 million years ago).
All maps of the Earth's ocean floor geology show ages younger than 145
million years, only about 1/30 of the Earth's 4.55 billion year
^ "SFT and the Earth's Tectonic Plates". Los Alamos National
Laboratory. Retrieved 27 February 2013.
^ a b Frisch, Wolfgang; Meschede, Martin; Blakey, Ronald C. (2010),
Plate Tectonics: Continental Drift and Mountain Building, Springer,
pp. 11–12, ISBN 9783540765042 .
^ Hillis, R. R.; Müller, R. D. (2003). Evolution and Dynamics of the
Australian Plate. Boulder, CO: Geological Society of America.
p. 363. ISBN 0-8137-2372-8.
^ Bird, P. (2003). "An updated digital model of plate boundaries".
Geochemistry, Geophysics, Geosystems 4 (3): 1027.
^ Age of the Ocean Floor
Wikimedia Commons has media related to Pacific tectonic plate.
Age of the Ocean Floor
Juan de Fuca
Philippine Mobile Belt