No mechanism was known, for example for continental drift when it was proposed by Wegener. |
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The site clarifies the often fuzzy distinction between the older theory of continental drift and its more recent reincarnation, plate tectonics. |
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Of course, none of these conclusions could have been reached without all these workers rejecting the idea of continental drift. |
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By the late 1960s the modern theories of continental drift and plate tectonics had become firmly established in geological thought. |
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The theory of continental drift would become the spark that ignited a new way of viewing the Earth. |
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The groove resembled the rifts between continental blocks that Wegener's theory of continental drift predicted far too closely for comfort. |
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According to the theory of continental drift, Africa and South America separated from this super continent first. |
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The Elephant Bird's Tale is a tale of Gondwana, and of continental drift or, as it is now called, plate tectonics. |
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Geologists and continental drift theorists have shown that there was once one super continent named Pangea. |
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For example, when Wegener proposed his theory of continental drift he could not explain how continents move. |
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How about Alfred Wegener and continental drift, probably the canonical story of establishment myopia? |
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The eminent German meterologist and father of the concept of continental drift, had used prop-driven sleds on the Ice Cap in the middle 1930s. |
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Quite suddenly, Wegener's theory of continental drift had the mechanism that it had previously lacked. |
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The stimuli for the IGCP lay in continental drift and the nature of the International Geophysical Year. |
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Fossils have been used to reconstruct ancient continental position ever since the idea of continental drift was first proposed. |
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However, at the time that Wegener proposed his theory of continental drift, most scientists still believed the Earth was a solid, motionless body. |
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This all-encompassing theory grew out of observations and ideas about continental drift and seafloor spreading. |
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Due to continental drift, Quebec was once located near the equator, hidden under a tropical sea. |
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When first proposed a generation ago, the theory of continental drift and plate tectonics was one of the most shocking scientific ideas of its day. |
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Tectonic and structural features Elements of global-scale crustal dynamics including continental drift and seafloor spreading. |
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This is one of many pieces of evidence to support the theory of continental drift. |
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But of course, the scientists who refused to accept Wegener's continental drift hypothesis in 1912 and up to about 1950 were entirely right to do so. |
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This notion of continental drift was revolutionary, going against all the accepted thinking in the Earth sciences. |
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Forty years ago, hardly any geologists believed in continental drift. |
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Unfortunately, the entire thesis of continental drift was also thrown out. |
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However, there are instances of animal occurrence that continental drift can't explain. |
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The agent of change could be anything from competition from other organisms, continental drift, or climate change such as an ice age. |
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However, his ideas were not taken seriously by many geologists, who pointed out that there was no apparent mechanism for continental drift. |
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Wegener's theory of continental drift won some adherents in the ensuing decade, but his postulations of the driving forces behind the continents' movement seemed implausible. |
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The origin and development of the Atlantic Ocean are now accounted for by the theories of continental drift and plate tectonics, according to which a vast protocontinent, Pangea, began to break up about 180 million years ago. |
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But continental drift is measurable today. |
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Then came World War II and the historical equivalent of continental drift. |
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Yet, in all of his many works, there is little of interest for the geologist, except perhaps his speculations on continental drift, and nothing specifically about mineral deposits. |
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We can imagine that long physical separation due to continental drift would lead to the emergence of diverse human communities with different languages, cultures, religions and institutions. |
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Convection movements in the magma under the crust caused the crust to crack and move laterally over the Earth's surface, this movement of the crust is at the origin of continental drift. |
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This heat flux is responsible for volcanic activity, drives continental drift and the formation of mountain ranges, and indirectly causes the process of metamorphism in rocks. |
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The effect of continental drift was to separate families of living organisms and thus bring about their development, independently of their descent, as well as the appearance of new species and the extinction of others. |
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An explanation of the mechanisms involved was provided by the concept of continental drift, subsequently confirmed by the theory of plate tectonics. |
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The model builds on the concept of continental drift, an idea developed during the first decades of the 20th century. |
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Distinguished scientists, such as Harold Jeffreys and Charles Schuchert, were outspoken critics of continental drift. |
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Seafloor spreading helps explain continental drift in the theory of plate tectonics. |
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When Alfred Wegener first presented a hypothesis of continental drift in 1912, he suggested that continents ploughed through the ocean crust. |
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The process of seafloor spreading helps to explain the concept of continental drift in the theory of plate tectonics. |
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Most paleomagnetic research in the late 1950s included an examination of the wandering of the poles and continental drift. |
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Computer simulations suggest that continental drift can indeed affect ocean circulation. |
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Contrary to previous supposition, the evolutionary speciation of this genus is no longer thought to have occurred with the breakup of Gondwana through continental drift. |
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Continental drift also has an effect on the weather, though the process is much slower. |
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The scientific reasoning behind all of the changes is Continental Drift. |
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