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The complete history of the Universe -- from the Big Bang to 200 my into the future

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Volcanoes

There are probably two main types of volcanoes.

On the young Earth it may have been radioactive heating which made light rocks collect together inside the mantle and bubble up to the surface. This may have formed the early crust. These were the early form of volcanoes.

The volcanoes we find on Earth today have a different origin.

Volcanoes formed by upwelling from mantle

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

eBook only $2.99
398 pages, 300 images

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