Seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwater ridges first proposed in the early 1960s by the american geologist harry h. Seafloor spreading definition, a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out see more. Seafloor spreading and other tectonic activity processes are the result of mantle convection mantle convection is the slow, churning motion of earth’s mantle convection currents carry heat from the lower mantle and core to the lithosphere convection currents also “recycle” lithospheric materials back to the mantle.
Sea-floor spreading is the process in which the ocean floor is extended when two plates move apartplates 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. Sea floor spreading in culture sea floor spreading the process by which new material that lies under the ocean rises and pushes the existing tectonic plates aside, creating new crust as it does so.
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. Seafloor spreading is a geologic process in which tectonic plates—large slabs of earth's lithosphere—split apart from each other.
Magnetization of the sea floor and seafloor spreading subduction other animations related to plate tectonics animation source: earthguide at scripps institution of oceanography key points seafloor spreading takes place at midocean ridges and produces basalt, the rock that makes up the oceanic crust. Seafloor spreading, theory that oceanic crust forms along submarine mountain zones, known collectively as the mid-ocean ridge system, and spreads out laterally away from them this idea played a pivotal role in the development of plate tectonics, a theory that revolutionized geologic thought during the last quarter of the 20th century. Sea-floor spreading the theory that the ocean floor is created at the spreading (accretionary) plate margins within the ocean basins igneous rocks rise along conduits from the mantle , giving rise to volcanic activity in a narrow band along the mid-ocean ridges.
Seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwater ridges first proposed in the early 1960s by the a.
Continental drift, sea floor spreading and plate tectonics plate tectonics is a theory developed in the late 1960s, to explain how the outer layers of the earth move and deform. Sea-floor spreading the theory that the ocean floor is created at the spreading (accretionary) plate margins within the ocean basins igneous rocks rise along conduits from the mantle, giving rise to volcanic activity in a narrow band along the mid-ocean ridges. Meanwhile, seafloor spreading in the atlantic basin moved northward: continental separation occurred at about 120 and 100 million years ago on the eastern and northern margins, respectively, of the grand banks of newfoundland about 90 million years ago in the labrador sea and about 70 million. 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.
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