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Sea floor spreading definition geography.
Alfred wegener a german meteorologist born in 1880 developed the idea of continental drift.
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.
Fellow scientists at the time thought the theory was ludicrous.
Spreading rates determine if the ridge is fast intermediate or slow.
The concept of seafloor spreading was put forward by h harry hess an american geologist.
He suggested that new sea floor forms at the oceanic ridges and spread outwards from the line of origin.
Sea floor spreading synonyms sea floor spreading pronunciation sea floor spreading translation english dictionary definition of sea floor spreading.
The concept of sea floor spreading.
Spreading rate is the rate at which an ocean basin widens due to seafloor spreading.
The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american.
The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate.
Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.
Plate tectonics and the geology of the sea.
World war ii gave scientists the tools to find the mechanism for continental drift that had eluded wegener.
Ocean currents waves and geophysical fluid dynamics.
This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century.
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Plate tectonics theory convection currents and sea floor spreading.
Further he claimed that continents would be pushed aside by the same forces that cause the ocean to grow.
Maps and other data gathered during the war allowed scientists to develop the seafloor spreading hypothesis this hypothesis traces oceanic crust from its origin at a mid ocean ridge to its destruction at a deep sea trench and is the mechanism for continental drift.
Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.
