Enhanced formation of clay in marine sediments in the lead up to the end-Permian mass extinction likely pulled the Earth back into a hot, high-CO2 state similar to that of the Precambrian.

中文翻译：

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逆转地球的碳引擎

在二叠纪末大灭绝之前，海洋沉积物中粘土的形成增强，可能会将地球拉回类似于前寒武纪的高温、高二氧化碳状态。