The Cocos Plate is a young oceanic tectonic plate beneath the Pacific Ocean off the west coast of Central America, named for Cocos Island, which rides upon it. The Cocos Plate was created approximately 23 million years ago when the Farallon Plate broke into two pieces, which also created the Nazca Plate. The Cocos Plate also broke into two pieces, creating the small Rivera Plate. The Cocos Plate is bounded by several different plates. To the northeast it is bounded by the North American Plate and the Caribbean Plate. To the west it is bounded by the Pacific Plate and to the south by the Nazca Plate.
The only land above water on the Cocos Plate is Cocos Island.
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The Cocos Plate was created by sea floor spreading along the East Pacific Rise and the Cocos Ridge, specifically in a complicated area geologists call the Cocos-Nazca spreading system. From the rise the plate is pushed eastward and pushed or dragged (perhaps both) under the less dense Caribbean Plate, in the process called subduction. The subducted leading edge heats up and adds its water to the mantle above it. In the mantle layer called the asthenosphere, mantle rock melts to make magma, trapping superheated water under great pressure. As a result, to the northeast of the subducting edge lies the continuous arc of volcanos —also known as the Central America Volcanic Arc— stretching from Costa Rica to Guatemala, and a belt of earthquakes that extends farther north, into Mexico.
The northern boundary of the Cocos Plate is the Middle America Trench. The eastern boundary is a transform fault, the Panama Fracture Zone. The southern boundary is a mid-oceanic ridge, the Galapagos Rise. The western boundary is another mid-ocean ridge, the East Pacific Rise.
A hotspot under the Galapagos Islands lies along the Galapagos Rise. (see Galapagos hotspot and Galapagos Microplate)
The Rivera Plate north of the Cocos Plate is thought to have separated from the Cocos Plate 5–10 million years ago. The boundary between the two plates appears to lack a definite transform fault, yet they are regarded as distinct.
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This course will provide the fundamental knowledge in neuroscience required to
understand how the brain is organised and how function at multiple scales is
integrated to give rise to cognition and beh
This course will provide the fundamental knowledge in neuroscience required to
understand how the brain is organised and how function at multiple scales is
integrated to give rise to cognition and beh
This course will provide the fundamental knowledge in neuroscience required to
understand how the brain is organised and how function at multiple scales is
integrated to give rise to cognition and beh
Le Guatemala, ou Guatémala, en forme longue la république du Guatemala (en República de Guatemala), est un pays d'Amérique centrale frontalier avec quatre pays: le Mexique, le Belize, le Salvador et le Honduras. Il est bordé au nord-est par la mer des Caraïbes et à l'ouest-sud-ouest par l'océan Pacifique. C'est le troisième pays de l'Amérique centrale par sa superficie, mais il en est le plus peuplé. Il fait également partie de l'Amérique latine.
La plaque caraïbe est une plaque tectonique de la lithosphère de la planète Terre. Sa superficie est de stéradians. On y associe généralement la plaque de Panama. Elle couvre : la majeure partie de la mer des Caraïbes et les îles de la Jamaïque, d'Hispaniola, de Porto Rico et des petites Antilles ; le Honduras, le Salvador, le Nicaragua et le nord du Costa Rica. La plaque caraïbe est en contact avec les plaques de Panama, des Andes du Nord, sud-américaine, nord-américaine et de Cocos.
La plaque pacifique est une plaque tectonique de la lithosphère de la planète Terre. Sa superficie est de stéradians. Il s'agit de la plus grande plaque tectonique terrestre. On y associe généralement les plaques de Futuna, du récif Balmoral, du récif Conway, des Nouvelles-Hébrides, de Bismarck Sud, de Bismarck Nord, de Manus et des Carolines. Elle couvre la quasi-totalité de l'océan Pacifique hormis les mers de Béring, d'Okhotsk, du Japon, Jaune, de Chine orientale, de Chine méridionale, des Philippines, de Java, de Célèbes, de Banda, de Bismarck, des Salomon, de Corail et de Tasman, le Pacifique oriental et l'est du golfe de Californie.
Explore les stades du neurodéveloppement, de l'induction au développement du cerveau postnatal, couvrant la régionalisation des plaques neurales, la fermeture des tubes neuraux et l'engagement du destin.
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