continental drift


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Fig. 118 Continental drift . The continent of Pangaea 200 million years ago.

continental drift

the theory originally put forward in 1912 by Alfred Wegener that continental masses were continuously moving over the surface of the globe as though floating on a sea of molten rock. Doubted extensively for many years, the theory is now generally accepted and supported by evidence from geomagnetic studies, the distribution of plants and animals, and the study of PLATE TECTONICS. Two hundred million years ago the present continents were joined in a universal land mass called Pangaea. Since that time, the continents have drifted apart and the study of plate tectonics shows that they are still moving. Over a period of 400 million years Britain has drifted from south of the tropic of Capricorn to its present position - over 80° of latitude. Pangaea was probably formed by previously separate continents coming together, and the Appalachian, Caledonian, Greenland and Scandinavian mountains probably resulted from North America and northern Europe coming into collision. Previous separation would account for the position of the equator and South Pole 440 million years ago.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Hence, eventually the continental drift will lead to Africa and Europe colliding with each other, resulting in one mega-continent called Eurafrica.
A wonderful boom in post-war (WWII) technology and exploratory spirit built the background for elevating the continental drift idea into plate tectonics as the geoscience paradigm.
Tinkering with Wikipedia's science pages Average Maximum words daily changed Wikipedia article edits per day Global warming 231 111 Evolution 89 142 Continental drift 19 24 General relativity 37 20 SOURCE: A.M.
|Cold front: Ice Age: Continental Drift loCK Up Monday, Channel 5, 10.55pm) CONVICT is transferred to a maximum security prison, where he falls foul of a sadistic warden with an old grudge against him, who is bent on abusing his position power to make the inmate's life a misery and destroy his good relationship with the guards.
Banks's experience living in Jamaica while on a Guggenheim fellowship inspired not only The Book of Jamaica (1980), about an outsider who becomes infatuated with that country and who tries to transcend class and racial differences, but also Continental Drift, his fifth novel.
Earlier work on the global distribution of bamboos has shown that bamboos evolved in the southern hemisphere on a landmass called Gondwanaland, parts of which spread apart to form South America, Africa and Asia when it broke up as a result of continental drift, the slow movement of tectonic plates on the earth's surface.
(SKY MOVIES COMEDY) 4.35pm Ice Age: Continental Drift. (U) (2012) Animated comedy sequel, with the voice of Ray Romano.
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Continue reading "Introducing Continental Drift, Jamie Kirchick's New Column About Europe" at...
Delivering the same old animation adventure, Ice Age: Continental Drift has viewers enjoying yet another fun but forgettable journey.
ICE AGE 4: CONTINENTAL DRIFT Voices: Ray Romano, John Leguizamo, Denis Leary, Queen Latifah Direction: Steve Martino & Mike Thurmeier
Continental Drift is a colourful romp with a generous glaze of mawkish sentiment to hammer home the importance of family in times of emotional upheaval.

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