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How much of the Earth’s surface consists of volcanic rock?

by Guest4689  |  12 years, 8 month(s) ago

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How much of the Earth’s surface consists of volcanic rock?

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  1. Brett
    Scientists estimate that more than three-quarters of Earth’s surface is of volcanic origin-- that is, rocks either erupted by volcanoes or molten rock that cooled below ground and has subsequently been exposed at the surface. Most of Earth’s volcanic rocks are found on the sea floor.

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