Continental drift, first proposed as a theory by Alfred Wegener in 1912, is the movement of the Earth's continents relative to each other. Francis Bacon, Antonio Snider-Pellegrini, Benjamin Franklin, and others had noted earlier that the shapes of continents on either side of the Atlantic Ocean (most notably, Africa and South America) seem to fit together. The similarity of southern continent fossil faunae and some geological formations had led a small number of Southern hemisphere geologists to conjecture as early as 1900 that all the continents had once been joined into a supercontinent known as Pangaea. Wegener was the first to formally publish the theory that the continents had somehow "drifted" apart. However, he was unable to provide a convincing explanation for the physical processes which might have caused this drift. His suggestion that the continents had been pulled apart by the centrifugal pseudoforce of the Earth's rotation was considered unrealistic by the scientific community.
The theory received support through the controversial years from South African geologist Alexander Du Toit as well as from Arthur Holmes. The idea of continental drift did not become widely accepted even as theory until the late 1950s. By the 1960s, geological research conducted by Robert S. Dietz, Bruce Heezen, and Harry Hess, along with a rekindling of the theory including a mechanism by J. Tuzo Wilson led to widespread acceptance of the theory among geologists.
The hypothesis of continental drift became part of the larger theory of plate tectonics. This article deals mainly with the historical development of the continental drift hypothesis before 1950. See: plate tectonics for information on current ideas underlying concepts of continental drift.
2006-10-12 04:17:25
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answer #1
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answered by Anonymous
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Continental drift, first proposed as a theory by Alfred Wegener in 1912, is the movement of the Earth's continents relative to each other.
Wegener was the first to formally publish the theory that the continents had somehow "drifted" apart. However, he was unable to provide a convincing explanation for the physical processes which might have caused this drift. His suggestion that the continents had been pulled apart by the centrifugal pseudoforce of the Earth's rotation was considered unrealistic by the scientific community.
The theory received support through the controversial years from South African geologist Alexander Du Toit as well as from Arthur Holmes. The idea of continental drift did not become widely accepted even as theory until the late 1950s. By the 1960s, geological research conducted by Robert S. Dietz, Bruce Heezen, and Harry Hess, along with a rekindling of the theory including a mechanism by J. Tuzo Wilson led to widespread acceptance of the theory among geologists.
The hypothesis of continental drift became part of the larger theory of plate tectonics. This article deals mainly with the historical development of the continental drift hypothesis before 1950. See: plate tectonics for information on current ideas underlying concepts of continental drift.
Evidence for continental drift is now extensive, in the form of plant and animal fossils of the same age found around different continent shores, suggesting that these shores were once joined. For example the fossils of the freshwater crocodile found in Brazil and South Africa.
2006-10-11 19:32:27
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answer #2
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answered by Anonymous
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He theorized that the World was then a Big large supercontinent called Pangea. Due to the Evolution of time and the movement of Plate tectonics the lands drift ang formed to laplands.. the Laurasia and Gondwanaland. The drift took years till its present formtion. Wegenr theorized this by proving some like the shape of Africa on its west side can be connected to the east part of South America. These proofs were not enough until Wegner died and the theory was not known anymore until Harry Hess discovered the theory of........forgot it but this theory was proven well until they discovered the Plate tectonics
2006-10-12 01:04:17
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answer #3
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answered by musiclover2008 3
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Whatever he wanted. It was his theory.
2006-10-14 18:02:29
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answer #4
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answered by nalaredneb 7
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