Sentences with phrase «old ice wedges»

This means the ice was older than the ash and older than the previous record holder — 120,000 - year - old ice wedges found in Alaska.

By Barry Brown Canadian researchers studying the ArcticÂ's ancient permafrost have discovered 700,000 - year - old ice wedges buried in the soil that have survived earlier periods of global warming, adding complexity to predictions about the impact of contemporary climate change.

Not exact matches

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«Estimated to be at least 740,000 years old, the wedges of Canadian ice illustrate the longevity and resiliency of deeper permafrost during warmer climates of the past, they say.»