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Topic: South American Plate


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In the News (Thu 20 Jun 19)

  
 South American Plate - Wikipedia, the free encyclopedia
The South American Plate is a continental tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge.
The southerly side is a complex boundary with the Antarctic Plate and the Scotia Plate.
The remains of the Farallon Plate (currently known as the Cocos Plate) and the Nazca Plate are still subducting under the western edge of the South American Plate.
en.wikipedia.org /wiki/South_American_Plate   (235 words)

  
 What is Plate Tectonics?
Plate tectonics is the study of how the Earth's plates are driven and shaped by geological forces that keep them in constant motion.
Plate boundaries might also move laterally past one another, as in the case of the Pacific and North American plates.
This plate moves northwesterly at a rate of about 2 inches (5 cm) per year, while the North American plate on the opposite side of the San Andreas fault is moving in a southerly direction.
www.wisegeek.com /what-is-plate-tectonics.htm   (734 words)

  
 Plate Tectonics - Crystalinks
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.
Tectonic plates across the globe are constantly shifting - though slowly, usually by a few centimetres a year - with the magma beneath the crust.
www.crystalinks.com /platetectonics.html   (2460 words)

  
 Plate tectonics
The margins of divergent plate boundaries are marked by mid-oceanic ridges in oceanic crust and are recognized by linear rift valleys where newly forming divergent boundaries occur beneath continental crust.
The Andes Mountains on the west coast of South America are a good example of a volcanic mountain range formed as a result of subduction of the Nazca plate beneath the South American plate along a convergent plate boundary.
In those areas where the rate of subduction is faster than the forward movement of the overriding plate, the lithosphere on the landward side of the volcanic island arc may be subjected to tensional stress and stretched and thinned, resulting in the formation of a back-arc basin.
members.tripod.com /blank005/geology/tectonics.html   (3702 words)

  
 ScienceMaster - JumpStart - Plate Motion
Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
Even though the Nazca Plate as a whole is sinking smoothly and continuously into the trench, the deepest part of the subducting plate breaks into smaller pieces that become locked in place for long periods of time before suddenly moving to generate large earthquakes.
This earthquake, within the subduction zone between the Nazca Plate and the South American Plate, was one of deepest and largest subduction earthquakes recorded in South America.
www.sciencemaster.com /jump/earth/plate_motion.php   (2550 words)

  
 USGS Earthquake Hazards Program » Historic Earthquakes
Peru is located on the western edge of the South American crustal plate, one of several large lithospheric plates that comprise the Earth's crust and slowly move with respect to one another.
The boundary between the South American plate and the Nazca plate to the west is one of the most seismically active areas of the world.
The Nazca plate is being overridden and driven beneath the westward-moving South American plate.
earthquake.usgs.gov /regional/world/events/1974_10_03.php   (675 words)

  
 Plate Tectonics : Plate Boundaries
As the giant plates move, diverging [pulling apart] or converging [coming together] along their borders, tremendous energies are unleashed resulting in tremors that transform Earth’s surface.
While all the plates appear to be moving at different relative speeds and independently of each other, the whole jigsaw puzzle of plates is interconnected.
Land on the west side of the fault zone (on the Pacific Plate) is moving in a northwesterly direction relative to the land on the east side of the fault zone (on the North American Plate).
www.platetectonics.com /book/page_5.asp   (831 words)

  
 South Atlantic Tectonics: Winter Quarter, 2001
The FP is a foundered complex of continental blocks differentially rifted during the opening of the South Atlantic in the middle Jurassic.
This paper concurs with that model in terms of the timing and geographical position of the FP breakout from modern Kwa-Zulu/Natal Province in South Africa during the middle and late Jurassic, though no mention and is made of the apparent rotation of the Falkland islands themselves that is documented in the Storey paper.
Earthquake studies have shown that some of the E-W relative motion between the Antarctic and South American plates is acommodated by strike-slip motion on the North Scotia ridge.
www.gps.caltech.edu /~clay/reading_group5.html   (2213 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.
The eastern boundary of the North American plate is in the middle of the Atlantic Ocean, where there is a belt of active seismicity.
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)

  
 CPD: South America overview
The outstanding geological feature of South America is the Andes, the longest mountain range in the world, which extends in a nearly straight line of over 7000 km from the north to the southern tip of the continent.
South of 7°S latitude, forest on the western slopes of the Andes is restricted to isolated protected pockets, and the predominant slope vegetation becomes chaparral, thorn scrub and desert.
Just as South America is sometimes called the "bird continent", the neotropics might well be termed the "plant continent" in deference to their uniquely rich botanical diversity (Table 50).
www.nmnh.si.edu /botany/projects/cpd/sa/sa.htm   (6706 words)

  
 A Lesson in Plate Tectonics
Plate margins are the edges of the plates, where all the awesome power of nature is released in earthquakes and volcanoes!
As a plate moves in one direction it collides with the adjacent plate on its "front" end, while the trailing end of the plate is being pulled and stretched (spreading) from the plate on the other end.
The long cordillera, or chord-like chain of volcanic mountains known as the Andes, are a result of the rumpling of the South American plate where the Nazca plate crashes into it, AND the volcanoes that have formed from the melting Nazca plate margin deep down.
www.extremescience.com /PlateTectonicsmap.htm   (812 words)

  
 South America - Wikipedia, the free encyclopedia
The Andes, likewise a comparatively young and seismically restless mountain range, run down the western edge of the continent; the land to the east of the Andes is largely tropical rainforest, the vast Amazon River basin.
South America is home to many interesting and unique species of animals including the llama, anaconda, piranha, jaguar, vicuna, and tapir.
South American cultures began domesticating llamas and alpacas in the highlands of the Andes circa 3500 BCE.
en.wikipedia.org /wiki/South_American   (2811 words)

  
 Plate Tectonics
The plate boundaries are mainly represented by oceanic ridges and trenches.
Plates move away from the oceanic ridge and descend beneath a trench at the subduction zone.
The rates and directions of plate motions were originally determined by computing the distance of oceanic floor of a known age from the oceanic ridge system.
www.mhhe.com /earthsci/geology/mcconnell/pte/pt.htm   (1066 words)

  
 South Atlantic
In the South Atlantic these transform faults are typically spaced some 50-100 km apart, reflect relative plate motion directions of the newly formed crust and occur at offsets of the normal faulted median rift valley that marks the axis of the ridge.
New data for global absolute plate motions based on plate tectonic (NUVEL 1A), GPS and astronomical studies (ITRF97) (Figure 9) indicate that the African plate is presently moving to the NE whereas the South American plate, east of the Andes, is moving to the NW.
For South America (east of the Andes), as noted above, the plate motion is consistently to the NW with an Euler pole located at approximately 25.4°S and 126.4°W. For South America west of the Andes the motions to the NE are consistent with the subduction of the Nazca plate beneath the Andes.
www.mantleplumes.org /SAtlantic.html   (3636 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)

  
 Tectonic Plates
Where an oceanic plate collides with a continental plate, the oceanic plate tips down and slides beneath the continental plate forming a deep ocean trench (long, narrow, deep basin.) An example of this type of movement, called subduction, occurs at the boundary between the oceanic Nazca Plate and the continental South American Plate.
The San Andreas Fault zone is an example of this type of boundary where the Pacific Plate on which Los Angeles sits is moving slowly northwestward relative to the North American Plate on which San Francisco sits.
Plate tectonics, the branch of science that deals with the process by which rigid plates are moved across hot molten material, has helped to explain much in global-scale geology including the formation of mountains, and the distribution of earthquakes and volcanoes.
www.webspawner.com /users/thecosyslughutt/tectonicplates.html   (2216 words)

  
 The Different Plates   (Site not responding. Last check: 2007-11-06)
The movement of the plates is explained by the earlier theory of Continental Drift.
The major plates include the Eurasian plate, the African plate, the North American plate, the South American plate, the Antarctic plate, the Indoaustralian plate, the Pacific plate and the Nazca plate.
Figure 1.10 shows the different plates on the world map, which shows that the plates are capped by both the oceanic and continental crust.
library.thinkquest.org /17457/platetectonics/3.php   (120 words)

  
 Department of Earth Science: Center for Computational Geophysics
The Caribbean-South American plate boundary zone is the result of Caribbean-American plate interactions starting in the Mesozoic, that are now accreting the Leeward Antilles arc to the South American craton.
Teleseismic tomography and seismicity show the Caribbean plate overriding the Atlantic seafloor of the South American plate east of the Gulf of Paria.
The plate boundary now consists of a series of EW-trending allochthonous belts that include the Leeward Antilles arc, the metamorphic belts of the Caribbean Mountain system, the para-autochthonous Serrania del Interior foreland fold and thrust belt, and associated foreland and shear zone basins.
cohesion.rice.edu /naturalsciences/earthscience/ccg.cfm?doc_id=3735   (681 words)

  
 PLATE PUZZLE
The plate puzzle activity requires cutting a copy of the map into pieces along the plate boundaries so that students can put it together like a jigsaw puzzle.
African Plate (The African plate is defined as two smaller plates, the Nubian and the Somalia plates, Figure 6, on the 2006 “This Dynamic Planet” map; because the plate boundaries between these smaller plates are not very distinct, we suggest cutting along the African plate boundaries as shown in Figure 12)
  For the plate puzzle activity, cut along boundaries (divergent, convergent and transform boundaries) and along the "plate boundary zones" (diagonal shaded areas) that are marked with a bold line.
web.ics.purdue.edu /~braile/edumod/platepuzz/platepuzz.htm   (3060 words)

  
 Troubled Times: South American Plate   (Site not responding. Last check: 2007-11-06)
The South American plate is about 1/3 land mass with a convergent plate boundary on the west coast.
Approximate longitude of 40 degrees and latitude of 15 degrees.
It is located about 2000 miles from the plate boundary on the west coast of South America.
www.zetatalk.com /info/tinfo05q.htm   (187 words)

  
 Plate Tectonics   (Site not responding. Last check: 2007-11-06)
To the south, is a destructive plate margin with volcanic activity (Etna and Vesuvius) and earthquakes.
Where the plates meet, the oceanic plate is forced downwards to form a sub duction zone.
As the crust continues to descend, it melts, partly due to heat resulting from friction caused by contact with the continental plate, and partly due to an increase in temperature as it re-enters the mantle.
html.rincondelvago.com /plate-tectonics.html   (1162 words)

  
 Project I
Near the boundary with the Juan De Fuca Plate the movement is to the south and west.
The South American Plate and the Nazca Plate are converging.
As the Pacific plate moves to the northwest new lithosphere "sits" on top of the hot spot and a new episode of volcanism is initiated.
www.uh.edu /~jbutler/physical/exercise10.html   (658 words)

  
 The Theory of PLATE TECHTONICS   (Site not responding. Last check: 2007-11-06)
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)

  
 Plate Tectonics Andes Mountain Range
The leading edge of the Nazca Plate is subducting below the South American Plate at a plate boundary known as a subduction zone.
As the sea-floor spreads on either side of this ridge, the Nazca Plate moves easterly while the Pacific Plate moves westerly.
The Galapagos Islands, off the northwestern coast of South America, are the result of a "Hot Spot" that exists over a mid-ocean ridge.
www.platetectonics.com /oceanfloors/andes.asp   (140 words)

  
 South American Plate   (Site not responding. Last check: 2007-11-06)
The South-American Plate is shown in purple on this map The South American Plate is a continental tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge.
The southerly side is a boundary with the Antarctic Plate and the Scotia Plate.
On its western edge the Farallon Plate has been subducting under the South American Plate since the Jurassic period.
south-american-plate.iqnaut.net   (154 words)

  
 Geomorphology: Chapter 2 Plate T-22
To the west, the Nazca plate is subducting beneath this portion of the South American plate.
Earthquakes related to subduction of the Nazca plate are frequent destructive events that can cause large mudslides composed of saturated soils derived from the Quaternary volcanic material on the eastern side of the valley.
The fifth and southwesternmost band of structures in the Plate image is the Cordillera Negra, seen also from the road to Húanuco (Figure T-22.3).
daac.gsfc.nasa.gov /geomorphology/GEO_2/GEO_PLATE_T-22.shtml   (787 words)

  
 EO Newsroom: New Images - Topography of South America
This image of South America was generated with data from the Shuttle Radar Topography Mission (SRTM).
Another zone of plate convergence occurs along the northwestern coast of South America where the Caribbean Plate also slides under the South American Plate and forms the northeastern extension of the Andes Mountains.
South of the Amazon, the Brazilian Highlands show a mix of landforms, including some broad areas of consistent topographic patterns that indicate the occurrence of simple erosional processes acting upon fairly uniform bedrock.
earthobservatory.nasa.gov /Newsroom/NewImages/images.php3?img_id=15332   (490 words)

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