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Topic: Cocos Plate


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In the News (Thu 23 May 19)

  
  North American Plate - Wikipedia, the free encyclopedia
The easterly side is a divergent boundary with the Eurasian Plate to the north and the African Plate to the south forming the northern part of the Mid-Atlantic Ridge.
The southerly side is a boundary with the Cocos Plate to the west and the Caribbean Plate to the east.
The westerly side is a convergent boundary with the subducting Juan de Fuca Plate to the north and a transform boundary with the Pacific Plate to the south along the San Andreas Fault.
en.wikipedia.org /wiki/North_American_Plate   (226 words)

  
 Pacific Ring of Fire - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-21)
The Ring of Fire is a direct consequence of plate tectonics and the movement and collisions of crustal plates [2] (http://pubs.usgs.gov/publications/text/slabs.html).
The eastern section of the ring is the result of the Nazca Plate and the Cocos Plate being subducted beneath the westward moving South American Plate.
Along the northern portion the northwestward moving Pacific plate is being subducted beneath the Aleutian Islands arc.
www.secaucus.us /project/wikipedia/index.php/Pacific_Ring_of_Fire   (426 words)

  
 Cocos Plate - Wikipedia, the free encyclopedia
The Cocos Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Central America.
From the rise the plate is pushed eastward and pushed or dragged (perhaps both) under the less dense overriding Caribbean Plate in the process called subduction.
The Cocos Plate is bounded by divergent boundaries to the south with the Nazca Plate and to the west with the Pacific Plate.
en.wikipedia.org /wiki/Cocos_Plate   (268 words)

  
 Friends of Cocos Island Foundation - Excepcionality
Cocos Island emerged as an oceanic island after a volcanic event in the underwater mountains that developed over the Cocos Tectonic Plate in the eastern tropical Pacific ocean.
As the only emergent point of the undersea Cocos mountain range in this sector of the eastern Pacific Ocean, it is a point of convergence for migratory marine species that arrive from the open sea to the waters surrounding the island to complete various stages of their life cycles (particularly feeding and reproduction).
Cocos Island is located in the eastern tropical Pacific Ocean in a strategic geographical position that is unique and exceptional in relation to the climactic and oceanographic phenomena that conditions the regional environment and that of the island.
www.cocosisland.org /english/island/excepcionality   (802 words)

  
 The March 7, 1992 Mw=6   (Site not responding. Last check: 2007-10-21)
The occurrence of the March 1990 earthquake sequence (Ms=6.4 and Ms=7.0), at the entrance of the Gulf of Nicoya (Protti et al., 1995b), indicates that the Cocos plate, SE of the RSB, is being subducted and that seismic slip is occurring along the main thrust zone.
The lack of energy release along the subducted Cocos plate beneath Costa Rica and specially beneath central and southern Costa Rica, as shown by Güendel 1986, was explained by Protti et al., 1995a.
Protti-Quesada, J. M., Correlation between the age of the subductin Cocos plate and the geometry of the Wadati-Benioff zone under Nicaragua and Costa Rica, MSc.
www.ovsicori.una.ac.cr /Revista/narain-2.htm   (3963 words)

  
 Continental Drift and Tectonic Plates
These plates (and the more numerous minor plates) move in relation to one another at one of three types of plate boundaries: convergent (two plates push against one another), divergent (two plates move away from each other), and transform (two plates slide past one another).
The key principle of plate tectonics is that the lithosphere exists as separate and distinct tectonic plates, which "float" on the fluid-like asthenosphere.
Tectonic plates are comprised of two types of lithosphere: continental and oceanic lithospheres; for example, the African Plate includes the continent and parts of the floor of the Atlantic and Indian Oceans.
www.crystalinks.com /tectonicplates.html   (1448 words)

  
 Plate Tectonics - Discover Our Earth
The largest plate is the Pacific plate, followed by the African plate, Eurasian plate, Australian-Indian plate, Antarctic plate, North American plate, and South American plate.
There are several entirely oceanic plates (Nazca, Cocos), but no entirely continental plates (with the possible exception of the Arabian peninsula; it depends on the criteria one uses to define individual plates and how much ocean is required to be considered "ocean").
The fact that continents are included as part of plates made of both continent and ocean suggests that the continents do not move independently of the oceans as Wegener envisioned, but rather that continent and ocean move together as part of a single plate.
atlas.geo.cornell.edu /education/instructor/tectonics/boundaries.html   (490 words)

  
 Land bridge - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-21)
Land bridges generally occur on continental shelves: the Bering Strait, where the Bering Land Bridge was during the last glaciation, is part of the edge of the North American plate.
A land bridge that rose from the sea floor because of upthrust at the edge of a continental plate is Central America.
Where the Cocos Plate, an oceanic tectonic plate off the west coast of Central America is being subducted in a convergent boundary under the North American Plate to the north and the South American Plate to the south, first an island arc, and then continuous dry land have been created.
www.sevenhills.us /project/wikipedia/index.php/Land_bridge   (509 words)

  
 [No title]   (Site not responding. Last check: 2007-10-21)
The Cocos plate is subducting under the Carribean Plate.
The upper portion of the Cocos plate is characterized by tensional earth quakes that become compressional as the Cocos plate is subducted and slides by the Carribean plate.
This region is where the melting of the oceanic Cocos plate crust is occurring.
people.colgate.edu /mscherr/Tectonics.htm   (145 words)

  
 [No title]   (Site not responding. Last check: 2007-10-21)
Similarly, the Cocos Plate, which is a remnant of the southern part of the Farallon Plate, is subducting beneath Mexico.
Because of the persistent northerly movement of the Pacific Plate it is probable that this boundary moved north in the ensuing millions of years, such that it was north of Vancouver Island by the time the Kula plate eventually disappeared beneath North America.
It appears likely that the Kula Plate subducted at a relatively steep angle, so that the Canadian Rockies are primarily comprised of thrusted sedimentary sheets with relatively little contribution of continental uplift, while the American Rockies are characterized by significant continental uplift in response to the shallow subduction of the Farallon Plate.
www.mala.bc.ca /~earles/farallon-kula-may00.htm   (659 words)

  
 Earth's Continental Plates - ZoomSchool.com
At the boundaries of the plates, various deformations occur as the plates interact; they separate from one another (seafloor spreading), collide (forming mountain ranges), slip past one another (subduction zones, in which plates undergo destruction and remelting), and slip laterally.
Seafloor spreading is the movement of two oceanic plates away from each other (at a divergent plate boundary), which results in the formation of new oceanic crust (from magma that comes from within the Earth's mantle) along a a mid-ocean ridge.
Plate tectonics from the University of Tennessee (Knoxville).
www.enchantedlearning.com /subjects/astronomy/planets/earth/Continents.shtml   (1162 words)

  
 Chapter 7
The plate motion vectors were calculated according to the absolute plate motion reference frame (Tamaki, 1997; DeMets et al., 1990; Gripp and Gordon, 1990) and were used to move the plates back to their respective positions.
Because the CNS-3 axis is east-west and the Nazca plate moves towards the east, the resulting northward shift of the spreading axis equals the spreading rate.
The bipartition of the Carnegie Ridge and the formation of the Cocos Ridge is, therefore, the most visible result of the jump of the spreading axis at 14.7 Ma.
www-odp.tamu.edu /publications/170_SR/chap_07/c7_3.htm   (1300 words)

  
 Introduction
The Cocos and Carnegie Ridges are two prominent submarine aseismic ridges that dominate the basin morphology of the eastern Panama Basin (Fig.
Although in contrast to the Cocos Ridge, uplift and exhumation of the upper plate are not observed at the indentation front of the Carnegie Ridge; therefore, the indentation of the ridge into South America is interpreted to have started at ~2 Ma (Gutscher et al., 1999).
The Cocos, Malpelo, and Carnegie Ridges are interpreted to be hotspot traces that began to form when the Galápagos hotspot initiated at ~20-22 Ma (Hey, 1977; Lonsdale and Klitgord, 1978).
www-odp.tamu.edu /publications/170_SR/chap_07/c7_2.htm   (628 words)

  
 Earthquake Hazards Program: Poster of the Colima, Mexico Earthquake of 22 January 2003 - Magnitude 7.6
The earthquake occurred near the junction of three tectonic plates: the North American Plate to the north-west, the Rivera Plate to the north-east, and the Cocos Plate to the south.
Both the Rivera Plate and the Cocos Plate are being consumed beneath the North American Plate in a north-west direction.
The slower moving Rivera Plate is moving north-west at about 2 cm per year relative to the North American Plate and the faster moving Cocos plate is moving in a similar direction at a rate of about 4.5 cm per year.
neic.usgs.gov /neis/poster/2003/20030122.html   (294 words)

  
 LICENSE PLATES ON LINE! .... Cocos (Keeling) Islands
It's thought that the higher numbered plates, although identical to the actually issued plates on Cocos, were special over-runs, made extra for collectors.
Current motorcycle plates on Cocos are also blue on reflective white, with the same COCOS (KEELING) ISLANDS legend, but with a simple serial number and no C prefix.
Not too many plates on this little hunk of coral, but in the original picture, a small white truck is visible (but the plate isn't).
www.pl8s.com /c/coco.htm   (237 words)

  
 Ring of Fire
Plates are like giant rafts of the earth's surface which often slide next to, collide with, and are forced underneath other plates.
In Central America, the tiny Cocos plate is crashing into the North American plate and is therefore responsible for the Mexican volcanoes of Popocatepetl and Paricutun (which rose up from a cornfield in 1943 and became a instant mountains).
From Russia's Kamchatka Peninsula to Japan, the subduction of the Pacific plate under the Eurasian plate is responsible for Japanese islands and volcanoes (such as Mt. Fuji).
www.crystalinks.com /rof.html   (1355 words)

  
 Plate Tectonics
Plate tectonics is the all-encompassing theory that allows us to understand the present configuration of the surface of the Earth, to recreate the past positions of the continents and ocean basins, and to make predictions about the future.
The angle of subduction is related to the age of the plate; the older the subducting plate, the steeper the angle.
This is primarily a function of equal density of the plates; however, it also occurs due to the direction of movement.
www.coloradocollege.edu /Dept/GY/rweb/plates.html   (1473 words)

  
 COCORI Complete Costa Rica - Island Hopping
Cocos is the only Costa Rican island with volcanic origins.
Caño is a product of plate tectonics--specifically, the subduction of the Cocos Plate beneath the Caribbean Plate pushed this land up from the ocean depths some fifty million years ago.
Violin Island, in a river mouth of the Osa Peninsula, is a relatively young island formed by river sediments and the growth of a mangrove swamp.
www.cocori.com /library/eco/islands.htm   (1426 words)

  
 Galapagos Geology - Plate Tectonics   (Site not responding. Last check: 2007-10-21)
The Galápagos are located on the very northern edge of the Nazca plate, which is bounded by the Cocos (north), the Pacific (west), the South American (east), and the Antarctic (south) plates (see map).
The Nazca plate itself is currently drifting south, away from the Cocos plate, and east, away from the Pacific plate.
At the point of collision, the South American plate, which is made of light continental crust, is riding up over the Nazca plate, which is made of dense oceanic crust.
www.rit.edu /~rhrsbi/GalapagosPages/Vulcanism2.html   (503 words)

  
 The Earthquake of 13 January 2001 in El Salvador - Dr. George Pararas-Carayannis
The Cocos tectonic plate is being subducted beneath two overriding plates: the North America to the North-West and the Caribbean to the South-East.
Active subduction of the Cocos plate beneath the Caribbean plate is responsible for the formation of the Middle America Trench - which is the plate boundary.
The amount of seismogenic coupling in the region appears to be controlled by several other interacting factors such as the age and motion rate of the subducting Cocos plate, the width of the seismogenic layer, the rheology of the overriding plate, and the influence of the nearby Motagua-Polochic fault system.
www.geocities.com /CapeCanaveral/Station/8361/Quake2001ElSalvador.html   (992 words)

  
 Mexico - Earthquakes   (Site not responding. Last check: 2007-10-21)
Situated atop three of the large tectonic plates that constitute the earth's surface, Mexico is one of the most seismologically active regions on earth.
The westward moving land atop the North American plate is slowed and crumpled where it meets the Cocos plate, creating the mountain ranges of southern Mexico.
Rather than one plate subducting, the Pacific and North American plates grind past each other, creating a slip fault that is the southern extension of the San Andreas fault in California.
countrystudies.us /mexico/49.htm   (426 words)

  
 v52e in fm97
The easternmost part of the Cocos plate did detach along the Panama fracture zone during this change, but there is no apparent reason to interpret this detachment as a cause of the change in motion.
The deformation of the North America plate as the subduction erosion observed on the inner wall of the trench, the Jalisco block individualization and the unusual magmatism of the western Mexican volcanic belt could be the consequence of subduction of this spreading center segment.
plate tectonics) seems to ultimately determine timing and magnitude of extension and volcanism, whereas volcanic and tectonic style are controlled by the crustal structure and by the gravitational and thermal effects of magmatism.
www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=fm97&database=/data/epubs/wais/indexes/fm97/fm97&maxhits=200&="V52E"   (4103 words)

  
 Amateur Geologist Structured Geological Glossary: Plate Tectonics
A point that is common to three plate and which must also be the meeting place of three boundary features, such as divergence zones, convergence zones, or transform fault.
An elongated region along which a plate descends relative to another plate, for example, the descent of the Nazca plate beneath the South American plate along the Peru-Chile Trench.
Small crustal fragments, island arc, or seamount which are transported by the moving oceanic plate and are added to a continental mass at the subduction zone.
www.amateurgeologist.com /content/glossary/tectonics/tectonics.html   (1219 words)

  
 Have the continents drifted? - ChristianAnswers.Net
Deformation occurs at the edges of the plates by three types of horizontal motion: extension (or rifting, moving apart), transform faulting (horizontal slipping along a fault line), and compression, mostly by subduction (one plate plunging beneath another).
Plate collisions would have pushed up mountains, while cooling of the new ocean floor would have increased its density, causing it to sink and thus deepen the new ocean basins to receive the retreating flood waters.
On the other hand, catastrophic plate tectonics in the context of the flood can explain how the plates overcame the viscous drag of the earth's mantle for a short time due to the enormous catastrophic forces at work, followed by a rapid slowing down to present rates.
www.christiananswers.net /q-aig/aig-c001.html   (3344 words)

  
 Response Spectra -- Tectonic Frame   (Site not responding. Last check: 2007-10-21)
On its western margin, it is being pushed by the Cocos plate (an oceanic plate), which moves toward the northeast at higher speed.
The result is the subduction of the Cocos plate under the Caribbean plate, and some of the consequences are the Middle-American Trench where the two plates get in contact, a graben in the continent and, inside this, the Volcanic Chain.
The stresses caused by the plate interaction and shear stress in the boundary area of the plate segments, and also the influence that exerts the migration of the magma in the magmatic chambers inside the graben, produce the complex faulting within the Managua Graben.
eureka.ya.com /rman/ingles/tectonics.html   (491 words)

  
 The Theory of PLATE TECHTONICS   (Site not responding. Last check: 2007-10-21)
The theory of plate techtonics was developed in the 1960s to explain the structure and movement of the earth’s crust or lithosphere.  This phenomenon is sometimes called continental drift.
This is a plate margin in which two plates are pushing against each other.  The result is that one plate bends and moves under the other plate in a process called subduction.
Converging plate margins are also known as subduction zones, or destructive plate margins.
www.webdesigns.ai /classnotes/form3/platetechtonics.html   (664 words)

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