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The oldest rocks on planet Earth, found in West Greenland and western Australia, are volcanic rocks that formed at the bottom of the ocean 3.8 billion years ago. Early the our planet's history, volcanism was very intense and widespread.

The oldest known present volcano is Etna, about 350000 years old.

There are inactive volcanoes on the Moon about 4.3 billion years old. They have not been eroded away due to the lack of a wind and water but bombarded by meteorites.

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13y ago

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