Climate revelations in Canadian caves' mineral deposits (IMAGE)

Boston College

Climate revelations in Canadian caves' mineral deposits

Caption

Researchers from the US and Canada found evidence in mineral deposits from caves in Canada that permafrost thawing took place as recently as 400,000 years ago, in temperatures not much warmer than today. But they did not find evidence the thawing caused the release of predicted levels of carbon dioxide stored in the frozen terrain.

Credit

Jeremy Shakun, Boston College

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