Seafloor Spreading Theory Evidence
Several types of evidence supported hesss theory of sea floor spreading.
Seafloor spreading theory evidence. 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. 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. The samples obtained from the seafloor drill reveals that the rocks away from the mid oceanic ridge were relatively older than the rocks near to it. 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.
The continents are embedded in the thicker lithospheric plates carried along by the action of seafloor spreading. Evidence in the rocks not long after hess published his ideas other scientists published their measurements of the magnetic properties of atlantic ocean seafloor basalt or the. Evidence for sea floor spreading. Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves.
By 1968 on the basis of these details and a variety of other evidence the theory of plate tectonics as it had become. The seafloor drilling system led to the evidence that supports the seafloor spreading hypothesis. Theory of plate tectonics upsc ias. This evidence led scientists to look again at wegeners hypothesis of continental drift.
Evidence from molten material.
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