Pangaea is the hypothetical ancient supercontinent that included all of the earth's major landmasses.
Also called Gondwanaland, ancient landmass that consisted of the present continents of South America, Africa, Australia, and Antarctica as well as the Indian subcontinent. Gondwanaland is believed to have been intact at least twice, about 350 million years ago and about 200 million years ago. Between these two periods all seven of the present-day continents probably formed a single landmass called Pangaea.
The idea that the southern continents were at one time united into a supercontinent was first proposed in 1885 by Austrian geologist Eduard Suess. He noted that all four continents have similar glacial deposits and fossils corresponding to the end of the Carboniferous Period and the beginning of the Permian Period (about 290 million years ago). However, these glacial deposits and fossils are absent from the northern continents. He named the ancient landmass Gondwanaland for a region in central India that displays the typical geological features of the Permian and Carboniferous periods.
2006-09-07 19:49:14
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answer #1
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answered by WA KKG 4
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You might want to do a Google search on plate tectonics, but here goes.....
Our planet's crust is made up of tectonic plates, and these move in relation to each other, very slowly from our perspective (the Australian plate is moving at approx 5 cm/yr, the fastest on the planet). These plates slip past each other, and sometimes override each other (think of earthquakes)
The crust of the planet is moade up of a lot of minerals, some denser than others. The 'lighter' ones tend to be on top, and don't get over-ridden by the denser stuff. Even when a plate with lighter stuff on top gets over-ridden, the lighter stuff can get scraped off and sort of accumulate on the one doing the over-riding.
In the past 4 billion years (geologic time is very long) there have been several times when all the continental land mass (the 'lighter' stuff) has gotten accumulated together for a while (millions of years) and then eventually broken up.
One of these supercontinents was called Pangaea. Gondwanaland was a part of Pangaea that stuck together for a bit longer after the lastest big break up.
2006-09-08 04:58:07
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answer #2
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answered by faehuntress 2
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Pangeae was the last supercontinent (of many). E North America was connected to W Europe, E South America was connected to W Africa, India, Austrailia, and Antartica was connected to E Africa, Asia was smaller (not completely assembled), but still connected to E Europe. The shape of it was basically Pac-Man (see link).
2006-09-08 13:25:15
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answer #3
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answered by QFL 24-7 6
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I don't think it's true, because of the fact that they had too shrink Africa 35-40 percent, central america is gone, you can't see it anywere on the Pangea map.
2006-09-08 02:41:33
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answer #4
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answered by Chase 4
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It was one big continent. There was lots of land. It split apart. It made smaller continents. Now it looks like earth.
2006-09-07 22:29:20
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answer #5
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answered by Anonymous
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Come ON! Do you own homework.
2006-09-07 22:27:28
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answer #6
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answered by Jim S 5
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