History of the Universe

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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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