Breakup of gondwanaland

The exact mechanisms behind Gondwana's split are still unknown. Gondwana was an ancient supercontinent that broke up about million years ago. Live Science Planet Earth Reference:

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Geologist Lewis Ashwal of Wit University led a group studying the mineral zircon, found in rocks spewed up by lava during volcanic eruptions.

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Australia began to separate from Antarctica perhaps as long ago as 80 million years Late Cretaceous , but sea-floor spreading between them became most active about 40 million years ago during the Eocene epoch of the Tertiary Period. At the time, plate tectonics weren't understood, so Suess didn't realize that all of these continents had once been in different locations.

What is Gondwana?

During its long span of existence, Gondwana, through movements that would have been imperceptibly slow to the unaided human senses, merged with a northern hemispheric land mass, Laurasia , to form the supercontinent Pangaea , until the two masses gradually parted again. The new ocean began closing some million years ago, shortly after the beginning of the major disintegration of Gondwana land.

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Computers have played a major role in analyzing and assembling the diverse data. Just when Gondwanaland broke up, how fast it moved, and just where Madagascar started out and what other large land masses it might have come into contact with as it drifted to its present position off the southeast coast of Africa, remains under discussion by paleobiologists and others. Some theorists believe that "hot spots," where magma is very close to the surface, bubbled up and rifted the supercontinent apart. Temperatures Daytime temps from C F , with a warmer basking area. Fill out my Wufoo form!

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  1. Three-billion-year old zircon minerals in 6-million-year-old trachyte rocks provide evidence for the lost continent of Mauritia, beneath the Indian Ocean. About 45 million years ago, the India Plate collided with Asia, buckling the crust and forming the Himalayas.