
	Where results make sense

Topic: Ocean Trench

Related Topics

List of oceanic trenches

Oceanic trench

Landform

Cayman Trench

Caribbean Sea

In the News (Thu 9 Jul 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Oceanic trench - Wikipedia, the free encyclopedia
		Trenches along with volcanic arcs and zones of earthquakes that dip under the volcanic arc as deeply as 700 km are diagnostic of convergent plate boundaries and their deeper manifestations, subduction zones.
		Trenches are centerpieces of the distinctive physiography of a convergent plate margin.
		Trenches distant from an influx of continental sediments lack an accretionary prism, and the inner slope of such trenches is commonly composed of igneous or metamorphic rocks.
	en.wikipedia.org /wiki/Ocean_Trench (3728 words)

	Puerto Rico Trench - Wikipedia, the free encyclopedia
		The Puerto Rico Trench is an oceanic trench located on the boundary between the Caribbean Sea and the Atlantic Ocean.
		The trench is associated with a complex transition between the subduction zone to the south along the Lesser Antilles island arc and the major transform fault zone or plate boundary that extends west between Cuba and Hispaniola through the Cayman Trench to the coast of Central America.
		The trench is 800 kilometers (500 mi) long and has a maximum a depth of 8,605 meters (28,232 ft) at Milwaukee Deep, which is the deepest point in the Atlantic Ocean.
	en.wikipedia.org /wiki/Puerto_Rico_Trench (623 words)

	300 Earth’s Ocean (Site not responding. Last check: 2007-10-23)
		Ocean currents are driven by the drag of the wind; hence are similar in pattern to atmospheric circulation.
		Ocean currents turn in large gyres, clockwise in the northern hemisphere and counterclockwise in the southern hemisphere due to the Coriolis effect.
		Trenches are the deepest spots in the ocean (over 6 miles deep) and are the location of subduction zones.
	www.csun.edu /geology/Class_Notes/ES300/300ocean.html (1272 words)

	Indian_ocean
		It is bounded on the north by southern Asia (the Indian subcontinent); on the west by the Arabian Peninsula and Africa; on the east by the Malay Peninsula, the Sunda Islands, and Australia; and on the south by the Southern Ocean.
		The northernmost extent of the Indian Ocean is approximately 30°north latitude in the Persian Gulf.
		The average depth of the ocean is 3,890 m (12,760 ft).
	www.brainyencyclopedia.com /encyclopedia/i/in/indian_ocean.html (1673 words)

	Ocean trench conservation. Commission on Ecology Papers No.1. IUCN-the World Conservation Union,Gland. -
		Ocean trenches are typically close to land masses and tend to have high rates of sedimentation, significant amount of which is of organic origin and an important available food source for trench communities.
		Trenches tend to be isolated linear systems that because of their seismic activity form a habitat that is unstable and unpredictable compared with the relative environmental stability of the adjacent abyssal plains.
		Trench faunas are not rich in species but are often high in numbers of endemic species.
	www.oceansatlas.org /cds_static/en/ocean_trench_conservation_commission_ecology__en_18520_18527.html (268 words)

	Inverted Mountains
		Trenches mostly lie parallel or adjacent to island arcs or mountain ranges of the continental margins.
		The trench margins are destructive because this is the region where the oceanic rocks are carried down after colliding with a continental plate.
		The only trenches in the Atlantic are the Puerto Rico Trench found north of the Caribbean islands, and the South Sandwich Trench found at the east of the Drake Passage located between South America and Antartica.
	www.upd.edu.ph /~ismed/agham/archive/3rd/extras/nikki/trenches.htm (1066 words)

	Ocean Trench - Search Results - MSN Encarta (Site not responding. Last check: 2007-10-23)
		Ocean Trench, long and very deep trough on the ocean floor.
		Away from the continental shelf and slope, the typical depth of the seafloor is 4,000 to...
		Philippine Sea, basin of the western Pacific Ocean between the Philippine Islands to the south and Japan to the north.
	uk.encarta.msn.com /Ocean_Trench.html (112 words)

	Oceans (Site not responding. Last check: 2007-10-23)
		The average depth of the oceans is 3,730 metres (12,238 feet).
		The Marianas Trench, on the floor of the North Pacific Ocean, is the deepest known ocean trench, reaching a maximum depth of 11,033 metres (36,198 feet).
		The oceans are home to an incredible variety of living organisms, ranging from the world's largest animal, the blue whale, to microscopic algae.
	www.pacificislandtravel.com /nature_gallery/oceans.html (2002 words)

	The Mariana Trench - Oceanography
		Of this number, 18 are in the Pacific Ocean, three in the Atlantic Ocean, and one in the Indian Ocean.
		The Mariana Trench is often used as a North-South passage by submarines as it is part of a long system of trenches that circle the Pacific Ocean, connected with the Japan and Kuril Trenches.
		The coordinates for the Mariana Trench are 11"21' North latitude and 142" 12' East longitude.
	marianatrench.com /mariana_trench-oceanography.htm (346 words)

	Plate Tectonics : Subduction Zones
		The Marianas Trench, where the enormous Pacific Plate is descending under the leading edge of the Eurasian Plate, is the deepest sea floor in the world.
		If a trench has flipped because of the arrival of a continent, and the newly subducted plate also carries a continent, a collision of land masses is unavoidable.
		When this happens, the ridge slowly moves toward the trench and the whole plate is eventually drawn down into the mantle, causing a global rearrangement of other plates and their borders.
	www.platetectonics.com /book/page_12.asp (337 words)

	Highbeam Encyclopedia - Search Results for Trench
		trench mouth TRENCH MOUTH [trench mouth] common term for Vincent's infection, an ulcerative membranous infection of the gums and mouth, by noncontagious infection, associated with a fusiform bacillus and a spirochete.
		ocean OCEAN [ocean] interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean.
		The allure of the trench: the one piece that every woman can wear anywhere is the trench.
	www.encyclopedia.com /SearchResults.aspx?Q=Trench (589 words)

	The Deep Sea
		The ocean bottom is divided into three major areas: the continental shelf, the continental slope, and the deep ocean basin.
		Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the so-called Ring of Fire, a zone of frequent earthquakes and volcanic eruptions.
		The deepest known point on Earth is at the bottom of the Mariana Trench, a depression in the floor of the western Pacific Ocean, just east of the Mariana Islands.
	www.ocean.udel.edu /deepsea/level-2/geology/deepsea.html (453 words)

	esm_lutgens_essentials_8\|The Ocean Floor\|Chapter Summary
		Ocean depths are determined using echo sounders and multibeam sonars.
		Oceanographers studying the topography of the ocean basins have delineated three major units: continental margins, the ocean basin floor, and mid-ocean ridges.
		Coral reefs, which are confined largely to the warm, sunlit waters of the Pacific and Indian oceans, are constructed over thousands of years primarily from the accumulation of skeletal remains and secretions of corals and certain algae.
	wps.prenhall.com /esm_lutgens_essentials_8/0,6602,237467-,00.html (568 words)

	Pacific Ocean Article, PacificOcean Information (Site not responding. Last check: 2007-10-23)
		Along the Pacific Ocean's irregular margins lie many seas, the largest of which are the Celebes Sea, Coral Sea, East China Sea, Sea of Japan, Sulu Sea, Tasman Sea and Yellow Sea.
		The monsoon region lies in the far western Pacific between Japan and Australia.Characteristic of this climatic region are winds that blow from the continental interior to the ocean in winter and in theopposite direction in summer.
		The ocean was sighted by Europeans earlyin the 16th century, first by Vasco Núñez de Balboa (1513) and then by FerdinandMagellan, who crossed the Pacific during his circumnavigation (1519 - 1522).
	www.anoca.org /islands/new/pacific_ocean.html (1970 words)

	Geology111-Lecture 31 (Site not responding. Last check: 2007-10-23)
		Ocean - Ocean: When two ocean plates come together the older (colder) plate generally dips beneath the younger plate as a subduction zone associated with a deep ocean trench where the two plates meet.
		Ocean - Continent: When an ocean plate and a continental plate come together the thinner and denser ocean plate generally dips beneath the continental plate as a subduction zone associated with an ocean trench where the two plates meet, and deep earthquakes below the continent (a Benioff zone).
		Ocean - Ocean: When two ocean plates move past each other along a strike slip boundary, minor amounts of vertical motion (a few kms) associated with the horizontal motion (often 100¹s of kms) can result in uplifted island blocks or small deep ocean basins.
	www.geol.binghamton.edu /faculty/naslund/Geol.111.lect31.html (589 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		These features coexist within the seismogenic zone of the Japan Trench plate subduction zone, where the >100-Ma portion of the Pacific plate is subducting at a fast rate (~8 cm/yr) beneath northern Japan causing major earthquakes along the trench.
		OPERATIONS STRATEGY Previous drilling in the Japan Trench region was in the DSDP era before the advent of advanced hydraulic piston corer/extended core barrel (APC/XCB) technology (Legs 56 and 57 in 1977 and Leg 87 in 1982).
		Crustal structure of the Japan Trench: the effect of subduction of ocean crust.
	www-odp.tamu.edu /publications/prelim/186_prel/186prel.txt (16646 words)

	NOAA Ocean Explorer: Puerto Rico trench
		The Puerto Rico Trench is the deepest part of the Atlantic Ocean, with water depths exceeding 8,400 meters (figure 1).
		Trenches in the Pacific are located in places where one tectonic plate subducts or slides under another one.
		The trench is less deep where the component of subduction is larger.
	oceanexplorer.noaa.gov /explorations/03trench/trench/trench.html (769 words)

	Outln Ch12
		Trenches are associated with subduction zones, where crustal plates are driven downward.
		Trenches not near a continent commonly have a belt of volcanic islands located on overthrusting side.
		Except in trenches, sediment thickness and variety both tend to be much less in the deep ocean, where only turbidity currents can bring large amounts of land-derived sediment.
	www.tamuk.edu /geo/Jordan/f03/es1/co/coch12.htm (1841 words)

	Ocean Trench (Site not responding. Last check: 2007-10-23)
		NOAA Ocean Explorer: Puerto Rico trench The Puerto Rico Trench: Implications for Plate Tectonics and Earthquake and Tsunami Hazards...
		The Puerto Rico Trench is the deepest part of the Atlantic Ocean, with water depths exceeding 8,400...
		Gothic Trench Coats Beginning with, written while recuperating from illness during World War I, Tolkien devised several themes - including the love story of Beren and LÃºthien - that were reused in successive drafts of his mythology.
	www.trench-fever.com /ocean-trench_12.html (1262 words)

	World Geography Facts \| Smallest Ocean \| Lowest Lake \| Largest Waterfall \| Longest River (Site not responding. Last check: 2007-10-23)
		The deepest spot in the ocean is called the Mariana Trench and is approximately 35, 797 ft (10,911 m) deep in the Pacific Ocean.
		It covers almost a third of the Earth's surface and goes from the Bering Sea in the Arctic north to the icy waters of Antarctica's Ross Sea in the south.
		The smallest ocean is the Arctic Ocean, which is about 10 times smaller than the Pacific Ocean.
	www.kidzworld.com /site/p1751.htm (481 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		The downward tilting of the sea floor produces a trench in the ocean that marks the plate boundary.
		An example of a trench formed along an oceanic-oceanic convergent boundary is the Aleutian Trench adjacent to the Aleutian Islands in the North Pacific Ocean.
		An example of a trench formed along this type of convergent boundary is the Peru-Chile Trench, adjacent to the western coast of South America.
	cse.cosm.sc.edu /hses/RthCrust/Features/pages/converge.htm (1548 words)

	WHOI : Media Relations : News Release : Major Caribbean Earthquakes and Tsunamis a Real Risk
		The Puerto Rico Trench, which is capable of producing earthquakes of magnitude 7 to 8 or greater, faces north and east into the Atlantic Ocean.
		He and colleague Dezhang Chu of the WHOI Applied Ocean Physics and Engineering Department received WHOI seed funding in 2004 to develop a new technology to measure seafloor change, which could be a step forwards in understanding the processes that trigger underwater earthquakes and tsunamis.
		Its primary mission is to understand the oceans and their interaction with the Earth as a whole, and to communicate a basic understanding of the ocean's role in the changing global environment.
	www.whoi.edu /mr/pr.do?id=2430 (1362 words)

	Pioneer in Marine Geophysics Honored
		The trench is located about 130 km (80 mi) north of Puerto Rico and the Virgin Islands, and has been the subject of research by Earth scientists during the past 50 years.
		Recent exploration of the trench funded by the National Oceanic and Atmospheric Administration (NOAA)'s Office of Ocean Exploration was conducted by a team from the U.S. Geological Survey (USGS) and the University of New Hampshire (UNH).
		Continued mapping of the entire trench area, stretching from north of the Dominican Republic to the Lesser Antilles, is planned for February and March of this year, after which a complete map of the sea floor will be presented to Dr.
	soundwaves.usgs.gov /2003/03/staff2.html (618 words)

	Tectonic Plates
		Trenches are the deepest parts of the ocean floor and are created by subduction.
		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.
		The trenches are the key to understanding how island arcs such as the Marianas and the Aleutian Islands have formed and why they experience numerous strong earthquakes.
	www.webspawner.com /users/thecosyslughutt/tectonicplates.html (2185 words)

	rosario.html (Site not responding. Last check: 2007-10-23)
		The ocean crust, comprised of dense basalt, was subducted under the continent, forming an ocean trench.
		Sediments were carried toward the trench, but since they were lighter than the crust they weren't pulled down into the subduction zone but merely filled up the trench.
		In places you can also see part of the ocean crust itself, basalt (sometimes in the form of pillow basalt) that was also scraped up onto land during the collisions.
	www.msstate.edu /dept/GeoSciences/CT/TIG/WEBSITES/LOCAL/Summer2003/Nelson_Angela/rosario.html (237 words)

	WHOI : Oceanus : In the Tsunami's Wake, New Knowledge About Earthquakes
		As one plate is thrust beneath another to form the deep Java Trench, it causes the buildup of stress in rock formations, which slip suddenly to generate earthquakes.
		The largest earthquake ever recorded was a magnitude-9.5 event in a geologically similar ocean trench off Chile in South America in 1960, which killed an estimated 2,000 people.
		However, the rupture plane of the 2004 quake appears to be significantly shallower and narrower in its down-dip direction, resembling a long, “skinny” stripe.
	www.whoi.edu /oceanus/viewArticle.do?id=5424 (797 words)

	Mariana Trench \| Pages for the public - by SmarterScience (Site not responding. Last check: 2007-10-23)
		The Mariana Trench is located north of New Guinea.
		The trench contains several deep points - called deeps - and the deepest of them all is the so-called Challenger Deep.
		Pressure in the oceans increases with depth (hydrostatic pressure; hydro means water and static is something like standing).
	www.smarterscience.com /marianatrench.html (720 words)

	FaSEAnating!
		An ocean trench, at 36,201 feet (11,034 metres) below sea level, Challenger Deep is the lowest part of the Pacific Ocean's Mariana Trench, located just east of the Philippines in the Pacific Ocean Islands, nearly 7 miles (11 kilometres) down.
		The crust over the oceans is heavier than the continental crust so when the plates collide, the ocean plates plunge downward toward the molten mantle, while the continental plate rides up over the top.
		Records indicate that average wave heights in the North Atlantic and Pacific oceans are on the rise, perhaps as a result of increased storm activity due to global warming.
	www.seadercraft.com /sea-sci.html (1238 words)

	No. 363: Sub-Ocean Maps
		He came within 15 percent of the right value, but knowing an average depth is a far cry from knowing the real shape of the ocean bottom.
		Sixteen years earlier, the first deep ocean sounding was made by the Antarctic explorer James Ross.
		The deepest ocean trench isn't much farther below sea level than the highest mountain is above it.
	www.uh.edu /admin/engines/epi363.htm (486 words)

	trench - Search Results - MSN Encarta (Site not responding. Last check: 2007-10-23)
		Atlantic Ocean, Caribbean Sea, Celebes Sea, Mariana Trench, Philippine Sea, Puerto Rico Trench
		Trench Mouth, acute infectious disorder of the mucous membranes of the mouth and throat, so called from its prevalence among World War I soldiers....
		Trench Warfare, fighting from a network of fortifications dug or constructed at or below ground level.
	ca.encarta.msn.com /trench.html (89 words)

Try your search on: Qwika (all wikis)