The Pacific Plate
is an oceanic tectonic plate
that lies beneath the Pacific Ocean. At 103 million km2
(40 million sq mi), it is the largest tectonic plate.
Pacific Plate and other principal plates of Earth's lithosphere
Hillis and Müller are reported to consider the Bird's Head Plate
to be moving in unison with the Pacific Plate.
Bird considers them to be unconnected.
Paleo-geology of the Pacific Plate
The 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 part disappearing by way of the plate tectonics
cycle is early-Cretaceous
(145 to 137 million years ago).
The Pacific Plate originated at the triple junction
of the three main oceanic plates of Panthalassa
, the Farallon
, and Izanagi Plates
, around 190 million years ago. The plate formed because the triple junction had converted to an unstable form surrounded on all sides by transform faults
, due to the development of a kink in one of the plate boundaries. The "Pacific Triangle", the oldest part of the Pacific Plate, created during the initial stages of plate formation, is located just east of the Mariana Trench
- ^ "Here are the Sizes of Tectonic or Lithospheric Plates". Archived from the original on 2016-06-05. Retrieved 2015-05-04.
- ^ "SFT and the Earth's Tectonic Plates". Los Alamos National Laboratory. Archived from the original on 17 February 2013. Retrieved 27 February 2013.
- ^ a b Wolfgang Frisch; Martin Meschede; Ronald C. Blakey (2 November 2010). Plate Tectonics: Continental Drift and Mountain Building. Springer Science & Business Media. pp. 11–12. ISBN 978-3-540-76504-2.
- ^ Hillis, R. R.; Müller, R. D. (2003). Evolution and Dynamics of the Australian Plate. Boulder, Colorado: Geological Society of America. p. 363. ISBN 0-8137-2372-8.
- ^ Bird, Peter (2003). "An updated digital model of plate boundaries". Geochemistry, Geophysics, Geosystems. 4 (3): 1027. Bibcode:2003GGG.....4.1027B. doi:10.1029/2001GC000252.
- ^ "Age of the Ocean Floor". Archived from the original on 2016-08-06. Retrieved 2009-02-07.
- ^ Boschman, Lydian M.; Hinsbergen, Douwe J. J. van (2016-07-01). "On the enigmatic birth of the Pacific Plate within the Panthalassa Ocean". Science Advances. 2 (7): e1600022. doi:10.1126/sciadv.1600022. ISSN 2375-2548.
Last edited on 19 June 2021, at 02:00
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