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last global ice agePhys Org
•88% Informative
Virginia Tech-led study provides first direct geochemical evidence of the "plumeworld ocean" era.
The last global ice age took place about 635 million to 650 million years ago .
Scientists believe global temperatures dropped and the polar ice caps began to creep around the hemispheres.
A quarter of the ocean was frozen due to extremely low carbon dioxide levels.
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