INTRODUCTION. Trench definition: A trench is a long narrow channel that is cut into the ground , for example in order to... | Meaning, pronunciation, translations and examples continental rift zone (d) Definition. Trench definition geology keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website In cross-section the trench slopes are usually asymmetric, with a steeper slope on the landward side. Trench definition is - a long cut in the ground : ditch; especially : one used for military defense often with the excavated dirt thrown up in front. Graben Fault or Rift Fault or Trench fault: Graben (German, Graden= Trench)Fault is one in which wedge shaped block has down with respect to side block. As … The definition of a trench is a narrow excavation made below the surface of the ground. Learn the words you need to communicate with confidence. A trench is also a long, deep valley at the bottom of an ocean. A year later, the trench was back, followed by a return to an elevated design in 1965. We're already there, in the trenches, doing the work. Definition of. To feed grossly, as a hog from a trough. ∎ (the trenches) the battlefields of northern France and Belgium in World War I: the slaughter in the trenches created a new cynicism | fig. Definition of bougainville_trench. The foundation for the new way of comprehending earth processes is the understanding that the outer layer of the earth is the lithosphere rather than simply the crust. The Pacific Ocean's infamous Ring of Fire is about 24,900 miles (40,000 kilometers) long and is where most of the world's earthquakes and volcanic events occur. Non-Operating Interest. However in locations of thick soil cover such testing may involve a deep sampling program by pitting, trenching, or drilling. depression of the sea floor. Sting/Wikimedia/(CC BY-SA 4.0) When the explorer Ferdinand Magellan visited Earth's biggest ocean … ∎ such a ditch dug by troops to provide a place of shelter from enemy fire. oceanic trench. oceanic trench. The Southern Rocky Mountain Trench was created mainly by Cenozoic-aged extension (normal faulting). Search Email. accrete-- v. To add terranes (small land masses or pieces of crust) to another, usually larger, land mass. Deep-sea trench, any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum oceanic depths, approximately 7,300 to more than 11,000 metres (24,000 to 36,000 feet). Search Paleogeology, ... Back-arc basins are associated with tensional forces caused by asymmetric seafloor spreading and oceanic trench rollback at some convergent plate boundaries. What is the scientific method? Create your own flash cards! Deep-sea trench, also called oceanic trench, any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum oceanic depths, approximately 7,300 to more than 11,000 metres (24,000 to 36,000 feet). Giga-fren . It happens when one lithospheric plate meets another—that is, in convergent zones—and the denser plate sinks down into the mantle. Map by Geology.com and MapResources. noun Electronics A defect in a circuit or wiring caused by imperfect connections, poor insulation, grounding, or shorting. Trench: very deep, elongated cavity bordering a continent or an island arc; it forms when one tectonic plate slides beneath another. Geology. 6. Geological survey is conducted for the purpose of studying the composition of materials that compose the earth. trench. This is an area of plate movement and earthquake activity from this movement. (Entry 1 of 2) 1 a : a long cut in the ground : ditch especially : one used for military defense often with the excavated dirt thrown up in front. Not to be confused with Triple divide. Oceanic trenches are up to 11 km deep, typically 50–100 km wide, and may be thousands of kilometres long. English English Wikipedia has an article on: oceanic trench. The nodules are about two to four centimeters in diameter. trench(oceanic trench) An elongate depression of the ocean floor which runs parallel to the adjacent volcanic islands or continent. trough - WordReference English dictionary, questions, discussion and forums. An excavation is any man-made trench, cut or cavity in the surface of the ground formed by earth removal. Definition of trench. Division of Marine Geology and Geophysics. The Aleutian Trench stretches westward in a giant arc from the southwestern coastline of Alaska. To make into a trough, or into the shape of a trough. How to use trench in a sentence. noun Geology A fracture in the continuity of a rock formation caused by a shifting or dislodging of the earth's crust, in which adjacent surfaces are displaced relative to one another and parallel to the plane of fracture. … They are deepest parts of the ocean floor and usually 5500 metres deep. Plate Tectonics: Convergent plate boundaries & subduction-zone volcanism. These plates converge at deep-sea trenches, plate boundaries where one plate sinks (subducts) below the other at so-called subduction zones. noun An open receptacle, generally long and narrow, as for water. The hadal zone, mostly comprising of deep trenches and constituting of the deepest part of the world’s oceans, represents the least explored habitat but one of the last frontiers on our planet. Map by Geology… Created. Each type of seismic wave has its own curve. Ridge: underwater mountain range that criss-crosses the oceans and is formed by rising magma in a zone where two plates are moving apart. OSHA considers an excavation to be a trench if it is 15 feet wide or less at the bottom of the excavation. Squad November 16, 2018. The Layers of the Earth. The subduction occur in the northern are operating both in the west and east. part of the seafloor topology that also contains volcanoes and mountain peaks higher than any on the continents. This is marked on the ocean surface by the presence of the Peru-Chile (or Atacama) Trench. Sign up here. But it is responsible for certain mountain ranges and other interesting geological features in the earth's crust. Test holes should be covered each day and plugged level with the surface when the site investigation is completed. association with back-arc basin. This is where the unusually shallow oceanic floor of the Hikurangi Plateau is subducting beneath the continental crust of the Australian Plate. Geology Dictionary - Terms Started With Alphabet O Term : ocean trench Definition : A deep, linear, relatively narrow depression in the sea floor, formed by the subduction of oceanic plates. B.A., Earth Sciences, University of New Hampshire; our editorial process. What little strike-slip movement that is found in the southern trench is not considered significant. Chiefly during, or with reference to, the First World War (1914–18). A trench is a deep and narrow hole, or ditch, in the ground, like the kind soldiers on frontlines might dig to give themselves shelter from the enemy. trench - A long and narrow deep trough in the sea floor; interpreted as … A program of prospecting, trenching, geochemistry and geophysics was conducted, along with a follow-up program of diamond drilling. Geology plays an important role in conducting geotechnical investigation for trenchless methods such as horizontal direction drilling (HDD), microtunneling and pipe jacking. A trench forms at the boundary where two tectonic plates meet. Pages - Menu. Dictionary.com DA: 18 PA: 14 MOZ Rank: 32. Most trenches are associated with subduction zones. In general, the depth is greater than the width, but the width of a trench (measured at the bottom) is not greater than 15 feet. Bougainvillea_glabra. The midocean ridge spreading centres are … The Kermadec Trench shoals southward and merges with the 3-kilometre-deep, mud-filled Hikurangi Trough east of the North Island. travertine - A terrestrial deposit of limestone formed in caves and around hot springs where cooling, carbonate-saturated groundwater is exposed to the air. A crime ridden area or hood known for its crimes and violence. Click here to study/print these flashcards. The northern boundary of Puerto Rico is marked by the 800-kilometer-long Puerto Rico Trench, which is the deepest part of the Atlantic Ocean, with a maximum depth of 8,648 meters (Figure 1). Term. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Home; Rocks; Gemstone Guide; Hydrogeology; Live Virtual Field Tours; Contribute to LG; About Us; Wednesday, July 1, 2015 . Jump to navigation Jump to search. Unlike large excavations, a trench is generally deeper than it is wide. Giga-fren. A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit). bougainville_trench has definitions from the fields of geology,geography 1 [ noun ] (geology,geography) a depression in the floor of the Pacific Ocean between New Guinea and the Solomon Islands . The Aleutian Islands form a volcanic arc that swings out from the Alaskan Peninsula and just north of the Aleutian Trench. Level. Trench Definition of Trench at Dictionary.com. HOME:: EARTH:: GEOLOGY:: OCEAN FLOOR. Geology; Cite Us; Shop; 0. It was discovered to be 10,924 meters deep in 1951 by researchers aboard the British survey ship Challenger. What does trench mean? Learn vocabulary, terms, and more with flashcards, games, and other study tools. Keyword Suggestions. Puysegur Trench. Trench definition, a long, narrow excavation in the ground, the earth from which is thrown up in front to serve as a shelter from enemy fire or attack. It was discovered to be 10,924 meters deep in 1951 by researchers aboard the British survey ship Challenger. [ trĕnch ] A long, steep-sided valley on the ocean floor. A long narrow and steep-sided depression on the ocean floor is called a trench. U.S. GEOLOGICAL SURVEY Ocean Trenches A computer animation and paper model By Tau Rho Alpha*, and John P. Galloway* Open-file Report 96-76A This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. TRENCH: An excavation in which material removal forms a narrow opening in the ground. continental margin Underwater extension of the continent; it comprises the continental shelf, the continental slope and the continental rise. All Free. (geology) A long, narrow, deep depression of the sea floor, with relatively steep sides. trellis drainage - A system of streams in which tributaries tend to lie in parallel valleys formed in steeply dipping beds in folded belts. Slurry trench construction is often started with a set of guide walls, which are constructed on the ground surface to outline the desired slurry trench and guide the excavation machinery. Noun . Any early warning systems for these disastrous events will require a more detailed understanding of marine geology of coastal and island arc environments. 55, January 2012) involved in geologic investigations that involve trench-ing or pitting. noun In geology, the lowest portion of a synclinal fold. Trieste was the first vehicle to explore the trench with a crew of two people. Geology is the scientific study of Earth and other terrestrial bodies, including its compostion history and the process that act upon it. The trench itself serves as an axis of sediment transport. The trenches are formed due to tectonic forces—either by down faulting or by done folding. [citation needed] Examples include the Hawaii, Iceland and Yellowstone hotspots.A hotspot's position on the Earth's surface is independent of tectonic plate boundaries, and so hotspots may create a chain of volcanoes … Geology and trench warfare The application of geology in war dates back some centuries (see Rose 2014), ... Trenches and dugouts clearly figure in thisin the definitions of the subject by Kranz and Salomon, as does the need to deal with waste waters that inevitably accompanied their excavations, both from groundwater build up, as well as surface-water flow and precipitation. prospecting trench. Translations . The definition of a trench is a long, narrow ditch sometimes dug by troops during wartime to hide from enemies. triple junction (d) Definition. oceanic trench (plural oceanic trenches) (geology, oceanography) A hemispheric-scale long but narrow topographic depression of the seabed. ocean floor Part of the Earth’s surface beneath the seas and the oceans; its topography is highly variable. Snow, sfter lying one full year on the glacier, is called: Firn. They typically form in locations where one tectonic … b trenches plural : a place, position, or level at which an activity is carried on in a manner likened to trench warfare —often used in the phrase in the trenches activists working in the trenches. TRANSFORM BOUNDARIES--where plates slide past one another, causing major earthquakes: Examples include San Andreas Fault and faults in the valley of the Dead Sea, Jordan, Israel, and … 7. By 1970, college geology majors were taught a set of ideas that were unheard of by most geology students prior to 1960. Geology Friday, December 9, 2011. In areas where soil cover is thin, the location and testing of bedrock mineralisation is made relatively straightforward by the examination and sampling of outcrops. A boot designed to be suitable for the wet, muddy conditions typical of trench warfare; usually in plural. South-west of Fiordland, the Puysegur Trench marks the zone where the oceanic crust of the Australian Plat Geology. Deep ocean trench definition. Geological Engineering is a branch of civil engineering that involves the survey of the geological conditions of a particular area. A long, narrow excavation in the ground, the earth from which is thrown up in front to serve as a shelter from enemy fire or attack. Geoligists use the scientific method in its studies. Example sentences with "prospecting trench", translation memory. Term. Engineering Geology Logging, Sampling, and Testing Chapter 5 5–2 (210–VI–NEH, Amend. The Marianas Trench, located in the western Pacific east of the Philippines, is the deepest known trench (10,924 … This large feature is called a SUBDUCTION ZONE. The Aleutian Trench is formed where the Pacific plate subducts beneath the North American plate in the Arctic region between the U.S. state of Alaska and the Russian region of Siberia. Landforms for Elementary School Go to Landforms for Elementary School … Wikipedia . The photo shows iron-manganese nodules on the seafloor north of the Puerto Rico Trench at a depth of about 5339 meters. Borrowed into middle english from old french trenche. trench. This model integrates available information on the hydration of the hadal lithosphere 37, 56, the fluid activity, 55, 59 and the carbon flux 64 in the subduction zone. The geology word for the action of glaciers eroding large blocks of underlying bedrock: plucking. deep-sea trench | geology | Britannica.com. trench * Similar Spelling . Trenches form when one tectonic plate slides beneath another plate at a subduction zone. Trench definition science. Cards Return to Set Details. Ocean Trench Lesson for Kids: Definition & Facts Go to Oceans for Elementary School Ch 13. Heat is absorbed from the surronding environment when ice crystals: melt. Nounditch, channel dug in earth. previous. trenches, a system of such excavations, with their embankments, etc Verb (used with object) to surround or fortify with trenches; entrench. The 19th century founder of the science of glaciology: Louis Agassiz. As verbs the difference between ditch and trench is that ditch is or ditch can be to discard or abandon while trench is (usually|followed by upon) to invade, especially with regard to the rights or the exclusive authority of another; to encroach. UCMP Glossary: Geology | Phylogenetics | Geology | Biochemistry | Cell biology | Ecology | Life history | Zoology | Botany | Paleogeography | abyssal plain-- The ocean floor offshore from the continental margin, usually very flat with a slight slope. Additional Geology Flashcards . The Mariana Trench is located in the western Pacific Ocean. East Luzon Trough (or East Luzon Trench) is a west-dipping subduction zone in the east of Luzon island, Philippines.It is believed to be part of the Philippine Trench, the major west-dipping subduction zone located in the eastern Philippine . Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. … 09/20/2010. Sediments move down the inner trench wall via channels and a series of fault-controlled basins. Red spikes show the hydration of the oceanic lithosphere, including the basaltic and gabbroic crust and … 7 Hot Facts About the Pacific Ring of Fire By: Mark Mancini | Updated: May 19, 2021. When two plates come together under the ocean a deep-sea trench is formed. The present scientific understanding of the hadal environment is still relatively rudimentary, particularly in comparison with that of shallower marine environments. For example, the Diamantina Trench formed when Antarctica and Australia pulled apart many millions of years ago. That action cracked Earth's surface and the resulting fracture zone became the trench. Most of the deepest trenches are found in the Pacific Ocean, which overlies the so-called "Ring of Fire". These relatively narrow down-folds in Earth's crust may be twice as deep (almost 12,000 meters) as the regular deep-sea floor (up to 6,000 meters). The Ring of Fire around the Pacific Ocean with its attendant intense volcanism and seismic activity poses a major threat for disastrous earthquakes, tsunamis and volcanic eruptions. Related. …be forced oceanward, causing the trench to “roll back” over the subducting plate, or it may serve as a “sea anchor” by remaining fixed in place relative to the top of the subducting plate. noun A large vessel, usually oblong, designed to hold water or food for animals. It is less steep than a trench.A trough can be a narrow basin or a geologic rift.There are various oceanic troughs, troughs found under oceans; examples include the rifts along the mid-ocean ridges Let's take a trip to the deepest valley on Earth. linear belt along which continental lithosphere stretches and pulls apart: Term. The theory of plate tectonics revolutionized geology in the 1960s. They typically form in locations where one tectonic plate subducts under another. Trencher definition is - a wooden platter for serving food. Definition - What does Geological Survey mean? A narrow stream-eroded canyon, gulley, or depression with steep sides. ∎ (trenches) a connected system of such ditches forming an army's line. A mineral lease interest that does not involve the rights and responsibilities of exploration, development, or production. A royalty interest is a non-operating interest. trench / tren ch / • n. a long, narrow ditch. The so… Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth’s lithosphere, since tectonic processes began on Earth between 3 and 3.5 billion years ago. Start studying geology 4. Trench definition osha. All Free. What Type Of Plate Boundary Is The Aleutian Trench Along the Aleutian Trench, the Pacific Plate is moving at 3 inches per year toward the North American Plate. Horst (German, Horst = upthrow) Fault is one in which wedge shaped block has gone up with respect to the side blocks. trench definition: 1. a narrow hole that is dug into the ground: 2. a deep hole dug by soldiers and used as a place…. The second important tectonic setting where many volcanoes occur is along or near converging plate boundaries. Geological background of the hadal trench in the plate tectonic model. What does trench mean? scar - WordReference English dictionary, questions, discussion and forums. Trencher definition is - a wooden platter for serving food. Exploring puerto rico s seamounts trenches and troughs transform boundary definition facts exles lesson convergent plate boundaries boundary plate tectonics by sam yanosko and evidence of seafloor spreading earth eclipse. by S.T. In the latter case, the enlargement of the basin forces the trailing part of … The details of this survey are used for locating, designing and constructing different types of engineering works. Bing; Yahoo; Google; Amazone; Wiki ; Trench definition. [ trench] (geography) A narrow, straight, elongate, U-shaped valley between two mountain ranges. next. A normal fault is no more typical, or better, than any other kind of fault. n. (Geological Science) a long narrow steep-sided depression in the earth's oceanic crust, usually lying above a subduction zone. How Subduction Happens . The definition of a trench is a long, narrow ditch sometimes dug by troops during wartime to hide from enemies. Trench definition geology keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. At deep-sea trenches, the ocean crust plunged deep into the Earth's mantle triggering major earthquakes. In geology, the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle. Term Definition GLOSSARY 1 geology study of the Earth’s structure and its rocks rock solid, non-living material that forms the earth’s crust minerals natural substances with a definite composition and structure elements substances made of identical atoms compounds substances made of non-identical atoms bonded together crystals solid substances showing definite geometrical shapes … Undergraduate 1. What Is A Subduction Zone Universe Today. Credit: USGS. These canyons form by channelized turbidites and generally lose definition with depth because continuous faulting disrupts the submarine channels. Fifty years ago, with the purchase and refit of a 200' pleasure yacht renamed the Vema , Maurice Ewing inaugurated Lamont's exploration of the largely unknown terrain beneath the world's oceans. The extensional faulting was nonetheless substantial, having extended as deep as 13.5 km (8.4 mi). Also known as submarine trench. Definition. The green arrow indicates relative plate motion. Related terms. Convergent Boundary. centerpieces of the distinctive physiography of a convergent plate margin. Where the two plates meet, the denser oceanic lithosphere of the Nazca Plate is forced down and under the more buoyant continental lithosphere of the South American Plate, descending at an angle into the mantle in a process called subduction. Finding Trenches. Ocean trenches exist in all the world's oceans. They include the Philippine Trench, Tonga Trench, the South Sandwich Trench, the Eurasian Basin and Malloy Deep, the Diamantina Trench, the Puerto Rican Trench, and the Mariana.
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