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Alfred wegener theory of plate tectonics
Alfred wegener theory of plate tectonics








alfred wegener theory of plate tectonics

It does not store any personal data.My first thought, in response to the prompt, was that "Yeah of course they should be taken seriously, it would be rude and inconsiderate to disregard an idea just because all the dots aren't connected." But then playing Devil's Advocate, I stopped and thought about how important it is that we don't take every idea seriously like that.

alfred wegener theory of plate tectonics

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alfred wegener theory of plate tectonics

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Alfred wegener theory of plate tectonics series#

At regular intervals the polarity of the Earth reverses this results in a series of magnetic stripes with the sea-floor rocks aligned alternately towards north and south poles. Iron particles in lava are aligned with the Earth’s magnetic field. palaeomagnetism – evidence of sea-floor spreading is gained from an examination of the polarity of the rocks that make up the ocean floor.As plates move apart magma rises along the constructive plate margin forming new land along the boundary of the plates A mid– ocean ridge or mid– oceanic ridge is an underwater mountain range, formed by plate tectonics. the discovery of mid-oceanic ridges discovered as the result of ocean floor mapping.In the second half of the twentieth century, more evidence emerged that supported the theory of continental drift. The video below might help you remember the evidence to support Wegener’s theory. It is used as evidence that these continents must have been joined together around 250 million years ago. the plant Glossopteris is a fern that has been found in Africa, Antarctica, Australia and South America.

alfred wegener theory of plate tectonics

fossil remains of mesosaurus, a prehistoric reptile, are found in both southern Africa and South America.fossil brachiopods found in some Indian limestones are comparable with similar fossils found in Australia.geology in northern Scotland closely match those found in eastern Canada, indicating that they were laid down in the same position.These deposits must have been formed together and subsequently moved evidence for a late-Carboniferous glaciation exists in deposits in India, South America and Antarctica.the ‘fit’ of the coastlines of South America and Africa.The early evidence of continental drift claimed by Wegener includes:










Alfred wegener theory of plate tectonics