what is seafloor spreading
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Seafloor spreading Age of oceanic crust; youngest (red) is along spreading centers. Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.Seafloor spreading helps explain continental drift in the theory of plate tectonics.t the Mid-Atlantic Ridge (and in other areas), material from the upper mantle rises through the faults between oceanic plates to form new crust as the plates move away from each other, a phenomenon first observed as continental drift.
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What Causes a Solar Eclipse? (Grade 4) What Causes a Solar Eclipse? When you hear that a solar eclipse is coming or go outside to view a solar eclipse, you have a good idea of what has caused it. Thanks to modern technology, astronomers have been able to get a closer look at the Sun and learn more about how it moves. However, that has not always been the case.
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Pangea The pattern of seafloor spreading indicates that Pangea did not break apart all at once but rather fragmented in distinct stages. Plate tectonics also postulates that the continents joined with one another and broke apart several times in Earth’s geologic history.
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seafloor spreading Abundant evidence supports the major contentions of the seafloor-spreading theory. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.irst, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.
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What is the process of sea floor spreading? Sea floor spreading is actually the creation of new oceanic  basaltic crust at divergent plate boundaries called mid-ocean  ridges. Material from the asthenosphere becomes m … olten as  convection currents cause it to rise toward the thin upraised  boundary between plates there.ockhound. Spreading of seafloor occurs at the mid-ocean rifts, where there is a continuous flow of material rising from the mantle. There is not a unanimously accepted theory as to the cause of the rifting that is taking place.
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- A man named Alfred Wegener first put out the theory of continental drift. That theory then evolved into sea floor spreading when a man named Harry Hess discovered that there a … re underwater mountain ranges spreading laterally away from them. That then arrives at the current theory of plate tectonics.
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Sea Floor Spreading and Polar Reversal So, some of the stripes of ocean floor would have normal polarity, meaning that the minerals in those rocks produced a magnetic field aligned in the same direction as the earth's present-day magnetic field.ea floor spreading is the process by which new oceanic crust is formed by the upwelling of magma through diverging tectonic plates. Learn about the relationship between sea floor spreading and polar reversals detected on the ocean floor.
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When does seafloor spreading occurs? This new crust flows away from each ridgeline in two symmetric sheets, one on each side. The rate of sea-floor spreading resulting from this process is from 1 to 20 centimetres per year, depending on the particular mid-ocean ridge. The Mid-Atlantic Ridge offers a particularly clear case of sea-floor spreading.
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Seafloor Spreading Key points. 1  Seafloor spreading takes place at midocean ridges and produces basalt, the rock that makes up the oceanic crust. 2  The Mid-Atlantic Ridge and East Pacific Rise are examples of midocean ridges. 3  Midocean ridges reach a typical summit elevation of 2,700 meters below sealevel. They are the shallowest major features of the seafloor. Perhaps counter to expectation, the oceans are deeper closer to continents and farthest from midocean ridges. Seafloor spreading is one of the two major processes of plate tectonics, the other being subduction. Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor.
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- Subduction is the process that destroys oceanic crust, and sea-floor spreading is the process that creates oceanic crust. Sea-floor spreading is driven by crust formation along the mid-ocean ridges, meandering undersea mountain ranges that span Earth like the seams of a baseball.eafloor spreading Theory that explains how continental drift occurs. It proposes that the ocean floor is moved laterally as new basalt rock is injected along mid-ocean ridges, and so the ocean floor becomes older with increasing distance from the ridge. See also plate tectonics.
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- Seafloor spreading is the extension of oceanic lithosphere that  occurs where two oceanic plates are moving apart.eafloor spreading is the extension of oceanic lithosphere that  occurs where two oceanic plates are moving apart.
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- Age of oceanic crust; youngest (red) is along spreading centers. Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.ge of oceanic crust; youngest (red) is along spreading centers. Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.
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Seafloor spreading Seafloor spreading happens at the bottom of an ocean as tectonic plates move apart. The seafloor moves and carries continents with it. At ridges in the middle of oceans, new oceanic crust is created. The motivating force for seafloor spreading ridges is tectonic plate pull rather than magma pressure, although there is typically significant magma activity at spreading ridges.
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Seafloor spreading Earlier theories (e.g. by Alfred Wegener and Alexander du Toit) of continental drift were that continents ploughed through the sea. The idea that the seafloor itself moves (and carries the continents with it) as it expands from a central axis was proposed by Harry Hess from Princeton University in the 1960s.ince then, it has been shown that the motion of the continents is linked to seafloor spreading. In the 1960s, the past record of geomagnetic reversals was noticed by observing the magnetic stripe anomalies on the ocean floor.
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Seafloor spreading Earlier theories (e.g. by Alfred Wegener and Alexander du Toit) of continental drift were that continents ploughed through the sea. The idea that the seafloor itself moves (and carries the continents with it) as it expands from a central axis was proposed by Harry Hess from Princeton University in the 1960s.
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- DA ANSWER IS seafloor spreadinghttp://wiki.answers.com/Q/The_process_by_which_molten_material_adds_new_oceanic_crust_to_the_ocean_floor_is_called http://wiki.answers.com/Q/Th … e_process_by_which_molten_material_adds_new_oceanic_crust_to_the_ocean_floor_is_called. 1 person found this useful.
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seafloor spreading Oceanic crust slowly moves away from mid-ocean ridges and sites of seafloor spreading. As it moves, it becomes cooler, more dense, and more thick. Eventually, older oceanic crust encounters a tectonic boundary with continental crust. In some cases, oceanic crust encounters an active plate margin.
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- Paraffin melts between 47. What temperature. What Is the Melting Point of Candle Wax: Wax is a chemical compound that is malleable near ambient temperatures. It is insoluble in water Bees wax melts at 62 degrees C while parafin wax can melt at 55 degrees C.ax Melting Instructions: A tutorial on how to safely melt wax for candle making. Hopefully you will never need to use it, but if you do need it, you will not have time to read the instructions. For small Make it a habit to constantly monitor the temperature of your.
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When does seafloor spreading occurs? Seafloor spreading occurs when two tectonic plates are moving apart from each other. Magma rises, and new Earth crust is formed. It is occurring all the time.In general, tectonic plates move a few cm per year.eafloor spreading occurs when two tectonic plates are moving apart from each other. Magma rises, and new Earth crust is formed. It is occurring all the time.
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Seafloor spreading In the general case, sea floor spreading starts as a rift in a continental land mass, similar to the Red Sea-East Africa Rift System today. The process starts with heating at the base of the continental crust which causes it to become more plastic and less dense.he destruction of oceanic crust occurs at subduction zones where oceanic crust is forced under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted.
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What is Sea floor Spreading? Sea-floor spreading occurs where oceanic plates are diverging from one another. Plates are huge slabs into which the crust as well as the upper part of the mantle (the intermediate zones between the Earth’s crust and core) is divided.As the plates move apart, the rocks break and form a crack between the plates.agma is a very hot, molten rock which is formed within the earth by partial melting of the mantle. As a result, the age of the rocks increases as one move away from the rift-zone (place where the earth’s crust is pulled apart). The mid-oceanic ridge is the primary site for sea-floor spreading.
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Seafloor Spreading Seafloor spreading produces major characteristics of the seafloor - 1) the age of the seafloor is progressively older away from midocean ridges, 2) the elevation of the seafloor is progressively lower away from midocean ridges, 3) the magnetic history of the seafloor bears the striped-pattern of the Earth's magnetic reversals, and 4) older parts of the seafloor have the greatest potential to have accumlated sediments over the longest time.
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2.3 Sea-floor spreading They named the process sea-floor spreading. Moreover, they proposed that the topographic contrast between the ridges and the oceanic abyssal plains was as a consequence of the thermal contraction of the crust as it cooled and spread away from either side of the ridge axis.hey named the process sea-floor spreading. Moreover, they proposed that the topographic contrast between the ridges and the oceanic abyssal plains was as a consequence of the thermal contraction of the crust as it cooled and spread away from either side of the ridge axis.
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Seafloor Spreading 1 Since the seafloor on each side of a midocean ridge moves in opposite directions, each side belongs to a different lithospheric plate. 2  Midocean ridges, transform faults and fracture zones are the key surface features produced by seafloor spreading. 3  In detail, midocean ridges are made up of short offset segments.
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- Rifting is the process by which the continental lithosphere stretches. A Continental rift is the belt or zone of the continental lithosphere where the extensional deformation (rifting) is occurring.These zones have important consequences and geological features, and if the rifting is successful, lead to the formation of new ocean basins. Continental rift is the belt or zone of the continental lithosphere where the extensional deformation (rifting) is occurring. These zones have important consequences and geological features, and if the rifting is successful, lead to the formation of new ocean basins.
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Chapter 5 Plate Tectonics Section 4 sea-floor Spreading As the molten material cools, it forms a strip of solid rock in the center of the ridge. Then more molten material splits apart the strip of solid rock that formed before, pushing it aside. This process, called sea-floor spreading, continually adds new material to the ocean floor. Scientists have found strange rocks shaped like pillows in the central valley of mid-ocean ridges. Such rocks can form only if molten material hardens quickly after erupting under water.