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News From the Field

New Evidence Hints at Global Glaciation 716.5 Million Years Ago


March 4, 2010

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Geologists have found evidence that sea ice extended to the equator 716.5 million years ago, bringing new precision to a "snowball Earth" event long suspected to have taken place around that time. The new findings--based on an analysis of ancient tropical rocks that are now found in remote northwestern Canada--bolster the theory that our planet has, at times in the past, been ice-covered at all latitudes.Full Story

Source
Harvard University

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