Continental drift - wikipedia Continental drift This article is about the development of the continental drift hypothesis before 1958. For the contemporary theory, see plate tectonics. For the Russell Banks novel, see Continental Drift ( novel ). For the fourth film in the Ice Age franchise, see Ice Age : Continental Drift. The continental drift of the last 250 million years Antonio Snider - Pellegrini 's Illustration of the closed and opened Atlantic Ocean ( 1858 ). Continental drift is the movement of the Earth 's continents relative to each other, thus appearing to `` drift '' across the ocean bed. The speculation that continents might have ' drifted ' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his theory was rejected by some for lack of a mechanism ( though this was supplied later by Arthur Holmes ). The idea of continental drift has been subsumed by the theory of plate tectonics, which explains how the continents move. Contents 1 History 1.1 Early history 1.2 Wegener and his predecessors 1.3 Rejection of Wegener 's theory, 1910s -- 1950s 2 Evidence of continental drift 3 See also 4 Works cited 5 External links History Further information : Timeline of the development of tectonophysics ( before 1954 ) Early history Abraham Ortelius ( Ortelius 1596 ), Theodor Christoph Lilienthal ( 1756 ), Alexander von Humboldt ( 1801 and 1845 ), Antonio Snider - Pellegrini ( Snider - Pellegrini 1858 ), and others had noted earlier that the shapes of continents on opposite sides of the Atlantic Ocean ( most notably, Africa and South America ) seem to fit together. W.J. Kious described Ortelius ' thoughts in this way : Abraham Ortelius in his work Thesaurus Geographicus... suggested that the Americas were `` torn away from Europe and Africa... by earthquakes and floods '' and went on to say : `` The vestiges of the rupture reveal themselves, if someone brings forward a map of the world and considers carefully the coasts of the three ( continents ). '' Writing in 1889, Alfred Russel Wallace remarks, `` It was formerly a very general belief, even amongst geologists, that the great features of the earth 's surface, no less than the smaller ones, were subject to continual mutations, and that during the course of known geological time the continents and great oceans had again and again changed places with each other. '' He quotes Charles Lyell as saying, `` Continents, therefore, although permanent for whole geological epochs, shift their positions entirely in the course of ages. '' and claims that the first to throw doubt on this was James Dwight Dana in 1849. In his Manual of Geology, 1863, Dana says, `` The continents and oceans had their general outline or form defined in earliest time. This has been proved with respect to North America from the position and distribution of the first beds of the Silurian -- those of the Potsdam epoch.... and this will probably prove to the case in Primordial time with the other continents also ''. Dana was enormously influential in America -- his Manual of Mineralogy is still in print in revised form -- and the theory became known as Permanence theory. This appeared to be confirmed by the exploration of the deep sea beds conducted by the Challenger expedition, 1872 - 6, which showed that contrary to expectation, land debris brought down by rivers to the ocean is deposited comparatively close to the shore on what is now known as the continental shelf. This suggested that the oceans were a permanent feature of the Earth 's surface, and did not change places with the continents. Wegener and his predecessors Alfred Wegener The idea that the American continents had once formed a single landmass together with Europe and Asia before assuming their present shapes and positions was speculated by several scientists before Alfred Wegener 's 1912 paper. Although Wegener 's theory was formed independently and was more complete than those of his predecessors, Wegener later credited a number of past authors with similar ideas : Franklin Coxworthy ( between 1848 and 1890 ), Roberto Mantovani ( between 1889 and 1909 ), William Henry Pickering ( 1907 ) and Frank Bursley Taylor ( 1908 ). In addition, Eduard Suess had proposed a supercontinent Gondwana in 1885 and the Tethys Ocean in 1893, assuming a land - bridge between the present continents submerged in the form of a geosyncline, and John Perry had written an 1895 paper proposing that the earth 's interior was fluid, and disagreeing with Lord Kelvin on the age of the earth. For example : the similarity of southern continent geological formations had led Roberto Mantovani to conjecture in 1889 and 1909 that all the continents had once been joined into a supercontinent ; Wegener noted the similarity of Mantovani 's and his own maps of the former positions of the southern continents. In Mantovani 's conjecture, this continent broke due to volcanic activity caused by thermal expansion, and the new continents drifted away from each other because of further expansion of the rip - zones, where the oceans now lie. This led Mantovani to propose an Expanding Earth theory which has since been shown to be incorrect. Continental drift without expansion was proposed by Frank Bursley Taylor, who suggested in 1908 ( published in 1910 ) that the continents were moved into their present positions by a process of `` continental creep ''. In a later paper he proposed that this occurred by their being dragged towards the equator by tidal forces during the hypothesized capture of the moon in the Cretaceous, resulting in `` general crustal creep '' toward the equator. Although his proposed mechanism was wrong, he was the first to realize the insight that one of the effects of continental motion would be the formation of mountains, and attributed the formation of the Himalayas to the collision between the Indian subcontinent with Asia. Wegener said that of all those theories, Taylor 's, although not fully developed, had the most similarities to his own. In the mid-20th century, the theory of continental drift was referred to as the `` Taylor - Wegener hypothesis '', although this terminology eventually fell out of common use. Alfred Wegener first presented his hypothesis to the German Geological Society on 6 January 1912. His hypothesis was that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations. Wegener was the first to use the phrase `` continental drift '' ( 1912, 1915 ) ( in German `` die Verschiebung der Kontinente '' -- translated into English in 1922 ) and formally publish the hypothesis that the continents had somehow `` drifted '' apart. Although he presented much evidence for continental drift, 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 ( Polflucht ) of the Earth 's rotation or by a small component of astronomical precession was rejected, as calculations showed that the force was not sufficient. The Polflucht hypothesis was also studied by Paul Sophus Epstein in 1920 and found to be implausible. Rejection of Wegener 's theory, 1910s -- 1950s The theory of continental drift was not accepted for many years. One problem was that a plausible driving force was missing. A second problem was that Wegener 's estimate of the velocity of continental motion, 250 cm / year, was implausibly high. ( The currently accepted rate for the separation of the Americas from Europe and Africa is about 2.5 cm / year ). And it did not help that Wegener was not a geologist. Other geologists also believed that the evidence that Wegener had provided was not sufficient. It is now accepted that the plates carrying the continents do move across the Earth 's surface, although not as fast as Wegener believed ; ironically one of the chief outstanding questions is the one Wegener failed to resolve : what is the nature of the forces propelling the plates ? The British geologist Arthur Holmes championed the theory of continental drift at a time when it was deeply unfashionable. He proposed in 1931 that the Earth 's mantle contained convection cells that dissipated radioactive heat and moved the crust at the surface. His Principles of Physical Geology, ending with a chapter on continental drift, was published in 1944. David Attenborough, who attended university in the second half of the 1940s, recounted an incident illustrating its lack of acceptance then : `` I once asked one of my lecturers why he was not talking to us about continental drift and I was told, sneeringly, that if I could prove there was a force that could move continents, then he might think about it. The idea was moonshine, I was informed. '' Geological maps of the time showed huge land bridges spanning the Atlantic and Indian oceans to account for the similarities of fauna and flora and the divisions of the Asian continent in the Permian era but failing to account for glaciation in India, Australia and South Africa. As late as 1953 -- just five years before Carey introduced the theory of plate tectonics -- the theory of continental drift was rejected by the physicist Scheidegger on the following grounds. First, it had been shown that floating masses on a rotating geoid would collect at the equator, and stay there. This would explain one, but only one, mountain building episode between any pair of continents ; it failed to account for earlier orogenic episodes. Second, masses floating freely in a fluid substratum, like icebergs in the ocean, should be in isostatic equilibrium ( in which the forces of gravity and buoyancy are in balance ). But gravitational measurements showed that many areas are not in isostatic equilibrium. Third, there was the problem of why some parts of the Earth 's surface ( crust ) should have solidified while other parts were still fluid. Various attempts to explain this foundered on other difficulties. Geophysicist Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article `` Seismology and the New Global Tectonics '', published in 1968, using data collected from seismologic stations, including those he set up in the South Pacific. It is now known that there are two kinds of crust : continental crust and oceanic crust. Continental crust is inherently lighter and its composition is different from oceanic crust, but both kinds reside above a much deeper `` plastic '' mantle. Oceanic crust is created at spreading centers, and this, along with subduction, drives the system of plates in a chaotic manner, resulting in continuous orogeny and areas of isostatic imbalance. The theory of plate tectonics explains all this, including the movement of the continents, better than Wegener 's theory. Evidence of continental drift For more details on this topic, see Plate tectonics. Fossil patterns across continents ( Gondwanaland ). Mesosaurus skeleton, MacGregor, 1908. Evidence for the movement of continents on tectonic plates is now extensive. Similar plant and animal fossils are found around the shores of different continents, suggesting that they were once joined. The fossils of Mesosaurus, a freshwater reptile rather like a small crocodile, found both in Brazil and South Africa, are one example ; another is the discovery of fossils of the land reptile Lystrosaurus in rocks of the same age at locations in Africa, India, and Antarctica. There is also living evidence -- the same animals being found on two continents. Some earthworm families ( e.g. Ocnerodrilidae, Acanthodrilidae, Octochaetidae ) are found in South America and Africa, for instance. The complementary arrangement of the facing sides of South America and Africa is obvious, but is a temporary coincidence. In millions of years, slab pull and ridge - push, and other forces of tectonophysics, will further separate and rotate those two continents. It was this temporary feature which inspired Wegener to study what he defined as continental drift, although he did not live to see his hypothesis generally accepted. Widespread distribution of Permo - Carboniferous glacial sediments in South America, Africa, Madagascar, Arabia, India, Antarctica and Australia was one of the major pieces of evidence for the theory of continental drift. The continuity of glaciers, inferred from oriented glacial striations and deposits called tillites, suggested the existence of the supercontinent of Gondwana, which became a central element of the concept of continental drift. Striations indicated glacial flow away from the equator and toward the poles, based on continents ' current positions and orientations, and supported the idea that the southern continents had previously been in dramatically different locations, as well as being contiguous with each other. See also Geological history of Earth -- timeline of historical continental configurations Works cited Notes Jump up ^ Antonio Snider - Pellegrini, La Création et ses mystères dévoilés ( Creation and its mysteries revealed ) ( Paris, France : Frank et Dentu, 1858 ), plates 9 and 10 ( between pages 314 and 315 ). ^ Jump up to : `` Historical perspective ( This Dynamic Earth, USGS ) ''. pubs.usgs.gov. Jump up ^ Oreskes 2002, p. 324. Jump up ^ Romm, James ( 3 February 1994 ), `` A New Forerunner for Continental Drift '', Nature, 367 ( 6462 ) : 407 -- 408, Bibcode : 1994Natur. 367... 407R, doi : 10.1038 / 367407a0. ^ Jump up to : Schmeling, Harro ( 2004 ). `` Geodynamik '' ( PDF ) ( in German ). University of Frankfurt. Jump up ^ Brusatte, Stephen, Continents Adrift and Sea - Floors Spreading : The Revolution of Plate Tectonics ( PDF ) Jump up ^ Kious, W.J. ; Tilling, R.I. ( February 2001 ) ( 1996 ), `` Historical perspective '', This Dynamic Earth : the Story of Plate Tectonics ( Online ed. ), U.S. Geological Survey, ISBN 0 - 16 - 048220 - 8, retrieved 29 January 2008 Jump up ^ Wallace, Alfred Russel ( 1889 ), `` 12 '', Darwinism..., Macmillan, p. 341 Jump up ^ Lyell, Charles ( 1872 ), Principles of Geology... ( 11 ed. ), John Murray, p. 258 Jump up ^ Dana, James D. ( 1863 ), Manual of Geology, Theodore Bliss & Co, Philadelphia, p. 732 Jump up ^ Oreskes, Naomi ( 2002 ), Continental Drift ( PDF ), archived from the original ( PDF ) on 4 February 2012 Jump up ^ Wallace 1889 ^ Jump up to : Wegener, Alfred ( 6 January 1912 ), `` Die Herausbildung der Grossformen der Erdrinde ( Kontinente und Ozeane ), auf geophysikalischer Grundlage '' ( PDF ), Petermanns Geographische Mitteilungen, 63 : 185 -- 195, 253 -- 256, 305 -- 309, archived from the original ( PDF ) on 4 October 2011. ^ Jump up to : Wegener, A. ( 1966 ) ( 1929 ), The Origin of Continents and Oceans, Courier Dover Publications, ISBN 0 - 486 - 61708 - 4 Jump up ^ Wegener, A. ( 1929 ), Die Entstehung der Kontinente und Ozeane ( 4 ed. ), Braunschweig : Friedrich Vieweg & Sohn Akt. Ges. Jump up ^ Coxworthy, Franklin ( 1924 ). Electrical Condition ; Or, How and where Our Earth was Created. J.S. Phillips. Retrieved 6 December 2014. Jump up ^ Pickering, W.H ( 1907 ), `` The Place of Origin of the Moon -- The Volcani Problems '', Popular Astronomy : 274 -- 287, Bibcode : 1907PA... 15... 274P Jump up ^ Frank Bursley Taylor ( 3 June 1910 ) `` Bearing of the Tertiary mountain belt on the origin of the earth 's plan '', Bulletin of the Geological Society of America, 21 : 179 -- 226. Jump up ^ Eduard Suess, Das Antlitz der Erde ( The Face of the Earth ), vol. 1 ( Leipzig, ( Germany ) : G. Freytag, 1885 ), page 768. From p. 768 : `` Wir nennen es Gondwána - Land, nach der gemeinsamen alten Gondwána - Flora,... '' ( We name it Gondwána - Land, after the common ancient flora of Gondwána... ) Jump up ^ Edward Suess ( March 1893 ) `` Are ocean depths permanent ? '', Natural Science : A Monthly Review of Scientific Progress ( London ), 2 : 180 - 187. From page 183 : `` This ocean we designate by the name `` Tethys '', after the sister and consort of Oceanus. The latest successor of the Tethyan Sea is the present Mediterranean. '' Jump up ^ Perry, John ( 1895 ) `` On the age of the earth '', Nature, 51 : 224 -- 227, 341 -- 342, 582 -- 585. Jump up ^ Mantovani, R. ( 1889 ), `` Les fractures de l'écorce terrestre et la théorie de Laplace '', Bull. Soc. Sc. Et Arts Réunion : 41 -- 53 Jump up ^ Mantovani, R. ( 1909 ), `` L'Antarctide '', Je m'instruis. La science pour tous, 38 : 595 -- 597 Jump up ^ Scalera, G. ( 2003 ), `` Roberto Mantovani an Italian defender of the continental drift and planetary expansion '', in Scalera, G. ; Jacob, K. - H., Why expanding Earth ? -- A book in honour of O.C. Hilgenberg, Rome : Istituto Nazionale di Geofisica e Vulcanologia, pp. 71 -- 74 ^ Jump up to : Obituary : Frank Bursley Taylor ( 1860 -- 1938 ), Proceedings of the American Academy, Vol. 75, No. 6 ( Dec. 1944 ), American Academy of Arts and Sciences, pp. 176 -- 178 ( retrieved 20 October 2015 ) Jump up ^ Taylor, F.B. ( 1910 ), `` Bearing of the tertiary mountain belt on the origin of the earth 's plan '', GSA Bulletin, 21 ( 2 ) : 179 -- 226, doi : 10.1130 / 1052 - 5173 ( 2005 ) 015 ( 29b : WTCCA ) 2.0.CO ; 2 Jump up ^ Henry R. Frankel, `` Wegener and Taylor develop their theories of continental drift '', in The Continental Drift Controversy : Wegener and the Early Debate Volume 1, Wegener and the Early Debate, pp. 38 -- 80, Cambridge University Press, 2012. ISBN 9780521875042 doi : 10.1017 / CBO9780511842368. 004 ^ Jump up to : Powell, James Lawrence ( 2015 ). Four Revolutions in the Earth Sciences : From Heresy to Truth. Columbia University Press. pp. 69 -- 70. ISBN 978 - 0 - 231 - 53845 - 9. Retrieved 20 October 2015. Jump up ^ Hansen, L.T., Some considerations of, and additions to the Taylor - Wegener hypothesis of continental displacement, Los Angeles, 1946. OCLC 1247437 OCLC Jump up ^ R.M. Wood, Coming Apart at the Seams, New Scientist, 24 January 1980 Jump up ^ `` Plate Tectonics : The Rocky History of an Idea ''. Wegener 's inability to provide an adequate explanation of the forces responsible for continental drift and the prevailing belief that the earth was solid and immovable resulted in the scientific dismissal of his theories. Jump up ^ University of California Museum of Paleontology, Alfred Wegener ( 1880 -- 1930 ) ( accessed 30 April 2015 ). Jump up ^ Unavco Plate Motion Calculator ( accessed 30 April 2015 ). Jump up ^ Holmes, Arthur ( 1931 ). `` Radioactivity and Earth Movements '' ( PDF ). Transactions of the Geological Society of Glasgow. Geological Society of Glasgow : 559 -- 606. Jump up ^ Holmes, Arthur ( 1944 ). Principles of Physical Geology ( 1st ed. ). Edinburgh : Thomas Nelson & Sons. ISBN 0 - 17 - 448020 - 2. Jump up ^ McKie, Robin ( 28 October 2012 ). `` David Attenborough : force of nature ''. The Observer. London. Retrieved 29 October 2012. Jump up ^ See map based on the work of the American paleontologist Charles Schuchert in Wells, H.G. ; Huxley, Julian ; Wells, G.P. ( 1931 ), The Science of life, p. 734 Jump up ^ Carey, S.W. ( 1958 ). Carey, S.W., ed. `` Continental Drift -- A symposium ''. Hobart : Univ. of Tasmania : 177 -- 363. Jump up ^ Scheidegger, Adrian E. ( 1953 ), `` Examination of the physics of theories of orogenesis '', GSA Bulletin, 64 : 127 -- 150, Bibcode : 1953GSAB... 64... 127S, doi : 10.1130 / 0016 - 7606 ( 1953 ) 64 ( 127 : EOTPOT ) 2.0.CO ; 2 Jump up ^ `` Jack Oliver, Who Proved Continental Drift, Dies at 87 ''. The New York Times. 12 January 2011. p. A16. Retrieved 6 June 2013. Jump up ^ Isacks, Bryan ; Oliver, Jack ; Sykes, Lynn R. ( 15 September 1968 ). `` Seismology and the New Global Tectonics ''. Journal of Geophysical Research. 73 ( 18 ) : 5855 -- 5899. Bibcode : 1968JGR... 73.5855 I. doi : 10.1029 / JB073i018p05855. Retrieved 6 June 2013. Jump up ^ `` Rejoined continents ( This Dynamic Earth, USGS ) ''. USGS. References Le Grand, Homer Eugene ( 1988 ), Drifting Continents and Shifting Theories, Cambridge University, ISBN 0 - 521 - 31105 - 5. Oreskes, Naomi ( 1999 ), The Rejection of Continental Drift, Oxford University Press, ISBN 0 - 19 - 511732 - 8 ( pb : 0 - 19 - 511733 - 6 ). Oreskes, Naomi ( 2002 ), `` Continental Drift '' ( PDF ), in Munn, Ted ; MacCracken, Michael C. ; Perry, John S., Encyclopedia of Global Environmental Change, Vol. 1, Chichester, West Sussex : John Wiley & Sons, pp. 321 -- 325, ISBN 0 - 471 - 97796 - 9, OCLC 633880622 Ortelius, Abraham ( 1596 ) ( 1570 ), Thesaurus Geographicus ( in Latin ) ( 3 ed. ), Antwerp : Plantin, OCLC 214324616 ( First edition published 1570, 1587 edition online ) Snider - Pellegrini, Antonio ( 1858 ), La Création et ses mystères dévoilés, Paris : Frank and Dentu. External links Library resources about Continental drift Resources in your library Resources in other libraries The Wikibook Historical Geology has a page on the topic of : Continental drift A brief introduction to Plate Tectonics, based on the work of Alfred Wegener Wegener and his proofs Maps of continental drift, from the Precambrian to the future Continental Drift : Theory & Definition at Live Science The theory of continental drift Benjamin Franklin ( 1782 ) and Ralph Waldo Emerson ( 1834 ) both made mention of Continental Drift Observe an animation of the breakup of Pangaea -- Animation of continental drift for the last 150 million years GND : 4032288 - 9 NDL : 00572551 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Continental_drift&oldid=819193967 '' Categories : Geological history of Earth Plate tectonics Hidden categories : CS1 German - language sources ( de ) Use dmy dates from January 2018 Wikipedia articles needing clarification from April 2017 CS1 Latin - language sources ( la ) Wikipedia articles with GND identifiers Talk Contents About Wikipedia বাংলা Български Brezhoneg Català Čeština Deutsch Eesti Ελληνικά Español Esperanto Euskara فارسی Føroyskt Français Gaeilge Galego 한국어 हिन्दी Hrvatski Bahasa Indonesia Italiano עברית ಕನ್ನಡ Қазақша Kreyòl ayisyen Кыргызча Latviešu Lietuvių Limburgs Magyar Bahasa Melayu Nederlands 日本 語 Norsk Norsk nynorsk Polski Português Русский Scots Seeltersk Simple English Slovenčina Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska தமிழ் తెలుగు ไทย Türkçe Українська Tiếng Việt 中文 Edit links This page was last edited on 8 January 2018, at 00 : 21. 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Question: what process causes the continents to drift apart how
Answer: Continental drift