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Topic: Convergent boundaries

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List of tectonic plate interactions

Divergent boundary

Plate boundaries

List of plate tectonics topics

Pacific Plate

Anatolian Plate

South American Plate

African plate

Nazca Plate

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Plate tectonics

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	Plate tectonics (Site not responding. Last check: 2007-11-05)
		Convergent boundaries (or active margins) occur where two plates slide towards each other commonly forming either a subduction zone (if one plate moves underneath the other) or an orogenic belt (if the two simply collide and compress).
		Divergent boundaries are typified in oceanic lithosphere by the rifts of the oceanic ridge system, including the Mid-Atlantic Ridge and, in continentental lithosphere by rift valleys such as the famous East-African Rift.
		The nature of a convergent boundary depends on the type of lithosphere in the plates that are colliding.
	www.sciencedaily.com /encyclopedia/plate_tectonics (1906 words)

	Convergent Boundaries (Site not responding. Last check: 2007-11-05)
		Boundaries where the plates are moving towards each other are called convergent boundaries.
		The volcanic islands of the Japanese Archipelago are an example of this type of boundary.
		These plate boundaries are the most geologically active areas on earth, and as they become more highly populated, it becomes more and more important for people to understand how they behave in order to prevent loss of life.
	cse.cosm.sc.edu /erth_sci/Igneous/Conv.htm (303 words)

	Untitled Document
		Convergent boundaries are plate boundaries in which one plate (Oceanic) is pushed down under another (Continental) plate.
		Divergent boundaries occur when plate are rifted apart and begin to move apart, creating large expanses of oceanic crust.
		Oblique Slip boundaries are boundaries in which one plate slide past another with neither loss or creation of crust.
	www.indiana.edu /~geol116/week7/week7.htm (260 words)

	Plate Tectonics: Convergent Plate Boundaries
		Interactions along convergent boundaries involve the collision of pairs of plates where oceanic lithosphere is often destroyed at subduction zones.
		Convergent boundaries may juxtapose oceanic lithosphere with oceanic lithosphere, continental lithosphere with oceanic lithosphere, and continents with continents.
		Convergent plate boundary: Where plates converge, e.g., collision between plates adjacent to trench, one plate over-rides another.
	www.mhhe.com /earthsci/geology/mcconnell/pte/cpb.htm (815 words)

	Convergent plate boundaries (from igneous rock) -- Encyclopædia Britannica
		These boundaries are destructive and consume the subducting oceanic lithosphere formed at the divergent centres.
		The fluid in the boundary layer is subjected to shearing forces.
		A range of velocities exists across the boundary layer from maximum to zero, provided the fluid is in contact with the surface.
	www.britannica.com /eb/article-80242?tocId=80242 (893 words)

	Plate tectonics - Wikipedia
		As it reaches shallow levels it starts to melt and is expelled at the divergent boundary, thus forcing the plates apart.
		The second hypothesis suggests that, if one end of a plate is being subducted at a convergent boundary, the downgoing slab of material will exert a stress on the other end, thus pulling it away.
		The genesis of divergent boundaries is sometimes thought to be associated with the phenomenon known as hotspots.
	www.web-dictionary.org /encyclopedia/te/Tectonic_plate.html (1592 words)

	Plate Motion On Earth (Site not responding. Last check: 2007-11-05)
		Convergent plates are boundaries in which two plates are moving towards each other.
		In this type of convergent plate boundary, the oldest plate (the denser material) will be subducted into the mantle, creating island arcs and trenches.
		Transform plates are boundaries that slide horizontally pass eachother in opposite directions producing ocean ridges.
	www.angelfire.com /ca6/ccproject2000/page6.html (196 words)

	Plate boundaries
		Plate boundaries are found at the edge of the lithospheric plates and are of three types,
		Convergent boundaries also explain why crust older than the Cretaceous cannot be found in any ocean basin-- it has already been destroyed by the process of subduction.
		Another example of a transform boundary is seen at the mid-ocean ridges, where the spreading centers are offset by transform faults anywhere from a few meters to several kilometers in length.
	scign.jpl.nasa.gov /learn/plate4.htm (940 words)

	Understanding plate motions [This Dynamic Earth, USGS]
		Convergent boundaries -- where crust is destroyed as one plate dives under another.
		Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
		As with oceanic-continental convergence, when two oceanic plates converge, one is usually subducted under the other, and in the process a trench is formed.
	pubs.usgs.gov /publications/text/understanding.html (2502 words)

	Mountain building along convergent plate boundaries (Site not responding. Last check: 2007-11-05)
		Crustal shortening/thickening in response to convergence of a subducting plate.
		If ALL convergence (100%) is accommodated by subduction, the overlying continent will remain undeformed and should undergo no net uplift (although topography will undoubtedly develop as arc volcanos appear).
		For 100 millimeters per year of convergence (a typical plate velocity), if 5% is accommodated by long-term shortening of the overlying plate, then the overlying plate will shorten at a rate of roughly 5 millimeters per year
	faculty.uaeu.ac.ae /~fhowari/GEOMORPHOLOGY/folding.htm (686 words)

	Sonderforschungsbereich 350 - Gottschalk, Neugebauer: On the competition of interplate shear... (Site not responding. Last check: 2007-11-05)
		Gottschalk G., Neugebauer H. On the competition of interplate shear and surface erosion at convergent plate boundaries.
		Convergent plate boundary tectonics is characterised by a variety of deformation patterns from subduction orogenesis to continental collision zones.
		The relative strength of the lower crustal layer compared to the upper mantle structure controls the lateral distance of the induced mass flow pattern within the lithospheric wedge.
	www.sfb350.uni-bonn.de /Wob/de/view_content/class73_id234.html (383 words)

	Plate tectonic definitions
		Plate tectonics is the theory that the earth's lithosphere (outer rigid shell) is composed of several dozen "plates", or pieces, that float on a ductile mantle, like slabs of ice on a pond.
		In plate tectonic theory earth history, at its simplest, is one of plates rifting into pieces diverging apart and new ocean basins being born, followed by motion reversal, convergence back together, subduction of the oceanic crust, plate collision, and mountain building.
		It is generated at divergent plate boundaries all around the earth, but also disappears down subduction zones at convergent plate boundaries.
	csmres.jmu.edu /geollab/Fichter/PlateTect/definitions.html (846 words)

	USGS Geology in the Parks
		An example of this kind of convergence produces the spectacular volcanic landscape of the Northwest.
		This type of convergent plate boundary, called a subduction zone, is known for producing historic earthquakes of great magnitudes.
		At these boundaries solid rock is crumpled and faulted.
	wrgis.wr.usgs.gov /docs/parks/pltec/converge.html (698 words)

	Earth Floor: Plate Tectonics
		Since the plates on either side of a transform boundary are merely sliding past each other and not tearing or crunching each other, transform boundaries lack the spectacular features found at convergent and divergent boundaries.
		Instead, transform boundaries are marked in some places by linear valleys along the boundary where rock has been ground up by the sliding.
		In other places, transform boundaries are marked by features like stream beds that have been split in half and the two halves have moved in opposite directions.
	www.cotf.edu /ete/modules/msese/earthsysflr/plates4.html (311 words)

	[No title]
		Convergent plate boundaries are where the lithosphere is being consumed.
		Divergent plate boundaries are where new crust is being created along the spreading axis of a mid ocean ridge.
		The mountains formed at ocean/continent boundaries are usually much higher and contain not only volcanics but large amounts of folded and faulted sediment shaved off the subducting plate.
	www.angelfire.com /sc2/ees/tect.html (2408 words)

	Convergent Plate Boundaries (Site not responding. Last check: 2007-11-05)
		In the ocean basins, convergent plate margins are marked by deep trenches in the sea floor.
		The convergent plate boundaries that occur on continents are the collisional mountain belts.
		This inclined zone of seismic activity along convergent plate boundaries is known as the benioff zone.
	www.geology.fsu.edu /~odom/1000/tectonics/cpb.html (746 words)

	Convergent Boundaries Places where plates crash or crunch together are called convergent ... (Site not responding. Last check: 2007-11-05)
		Convergent Boundaries Places where plates crash or crunch together are called convergent boundaries
		Places where plates crash or crunch together are called convergent boundaries.
		Yes, convergent boundaries are dangerous places to live, but with preparation and watchfulness, the danger can be lessened somewhat.
	www.k12.nf.ca /gc/Science/Geology03/Doug%20Noonan/convergent.htm (412 words)

	Plate Tectonics: Plate Boundaries
		Convergent boundaries are located where subduction is active and the lithosphere is being "consumed".
		Transform boundaries occur where plates are grinding past one another, like the San Andreas fault.
		Plate boundary zones are broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
	www.uwsp.edu /geo/faculty/ritter/geog101/textbook/tectonics_landforms/tectonics_plate_boundary_types.html (153 words)

	Chapter 7 Test Preview (Site not responding. Last check: 2007-11-05)
		The African rift valleys are associated with a(n) ____________ boundary.
		The true outer boundary of the continents is the ____________.
		During the break-up of a continent along a divergent plate boundary, large downfaulted valleys are generated.
	ourworld.cs.com /mrbutlerunion/Pre7tst.htm (1518 words)

	3. Plate Tectonics
		Divergent plate boundaries occur where plates appear to be moving apart - for example along mid- oceanic ridges or along the Great Rift Valley in East Africa.
		Transform plate boundaries occur where plates appear to be sliding sideways past each other.
		Convergent plate boundaries occur where plates appear to be coming together.
	www.rossway.net /20503.htm (2137 words)

	ch4_Convergent Plate boundaries
		Summary diagram of processes at a convergent plate boundary between an oceanic and continental plate.
		Transform plate boundary - where plates slide past each other, neither is consumed or created.
		Convergence between these plates has resulted in the formation of the Andes Mountains (the second highest mountain range on Earth), extensive volcanism, and widespread earthquake activity.
	www.mhhe.com /earthsci/geology/mcconnell/plate_tectonics/cpb.htm (719 words)

	The Earth At Work
		The boundary around any one plate may vary in character from place to place, but the nature of one plate's boundary with any other single plate is in large measure dictated by the relative motion of the two plates involved.
		Plate boundaries are therefore predominantly one of three basic types—divergent, convergent or transform.
		Most convergent boundaries involve oceanic lithosphere on at least one side, but continent-continent convergences make for some of the planet's most dramatic scenery, including the Himalayas (right) and the Alps.
	www.cliffshade.com /colorado/tectonics.htm (12224 words)

	Plate Tectonics
		Along a convergent margin, two plates move towards each other.
		As you might suspect, two plates grinding and scraping together as they converge generate a lot of earthquakes.
		Convergent margins can generate larger earthquakes than any other plate tectonic setting.
	geology.csusb.edu /DIVGRANT/ptect/ptect3.htm (713 words)

	LESSON PLANET - 30,000 Lessons and 324 Lesson Plans for Convergent Boundaries (Site not responding. Last check: 2007-11-05)
		Boundaries and Borders - Students understand how regional boundaries figure in their day-to-day lives, and those of other young people and adults around the world.
		Crossing Boundaries: The Environment, Disease, And Conflict In Asia - Students study boundaries as they apply to matters of pollution, disease, and conflict within the continent of Asia, between Asian nations, and between Asian nations and members of the international community.
		Famous Boundaries - Students label boundaries on a map and then think about the boundaries they are familiar with near their homes.
	www.lessonplanet.com /search/Science/Earth/Plate_Tectonics/Convergent_Boundaries (534 words)

	Earth Floor: Plate Tectonics
		The place where the two plates meet is called a plate boundary.
		Boundaries have different names depending on how the two plates are moving in relationship to each other
		With respect to plate boundaries is your home located in the middle of, or near the boundary of a plate?
	www.cotf.edu /ete/modules/msese/earthsysflr/plates1.html (198 words)

	Plate Boundaries (Site not responding. Last check: 2007-11-05)
		Ocean ridges and subduction zones are boundaries between "plates" of lithosphere.
		Convergent boundaries come in three varieties depending upon the type of lithosphere that is juxtaposed across a subduction zone.
		Plates on either side of a transform boundary slide past each other without either plate being consumed and without a gap opening between the plates.
	enterprise.cc.uakron.edu /geology/natscigeo/Lectures/ptectonics/pboundary.htm (1166 words)

	A Science Odyssey: You Try It: Plate Tectonics: Slide (Site not responding. Last check: 2007-11-05)
		New crust is continually being pushed away from divergent boundaries (where sea-floor spreading occurs), increasing Earth's surface.
		The boundary where the two plates meet is called a convergent boundary.
		At a depth between 190 and 430 miles (300 and 700 kilometers), the rock of the descending plate melts.
	www.pbs.org /wgbh/aso/tryit/tectonics/convergent.html (133 words)

	Major Tectonic Plates of the World (Site not responding. Last check: 2007-11-05)
		Three types of movement are recognized at the boundaries between plates: convergent, divergent and transform-fault.
		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.
	geology.er.usgs.gov /eastern/plates.html (245 words)

	PNW Glossary (Site not responding. Last check: 2007-11-05)
		a convergent plate boundary at which a plate carrying oceanic crust subducts beneath the margin of a continent.
		a convergent plate boundary at which a plate carrying oceanic crust subducts beneath the margin of another plate that carries oceanic crust.
		a plate boundary along which the two plates are moving side-by-side, in opposite directions parallel to the boundary.
	wvcweb.ctc.edu /rdawes/CourseInfo/glossary.html (8331 words)

	Introduction to Plate Tectonics (Site not responding. Last check: 2007-11-05)
		The mid-Atlantic Ridge, a topographically high area near the middle of the Atlantic Ocean, is an example of a divergent plate boundary.
		The west margin of the South American continent, where the oceanic Nazca Plate is pushed toward and beneath the continental portion of the South American Plate, is an example of a convergent plate boundary.
		The San Andreas fault in California is an example of a transform plate boundary, where the Pacific Plate slides past the North American Plate.
	volcano.und.nodak.edu /vwdocs/vwlessons/plate_tectonics/part13.html (156 words)

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