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Volcanoes take a holiday, glaciers rule the world 14 May 2009

Posted by admin in current research, geoscience.
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Around 2.4 billion years ago plate tectonics shut down, volcanism took a break for 250 million years, and glaciers spread across the world’s surface, it says here.

Volcano ‘vacation’ produced first glaciers – Discovery News, 14 May 2009

The Volcanism Blog