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Earth & Climate Science

These rich fossil formations are made of ancient dirt, or paleosols.

这些丰富化石是由古老 或古壤构

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Earth & Climate Science

And the paleosols of the John Day formation are pretty soft and prone to erosion.

翰戴地层壤 非常柔软,容易受到侵蚀。

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epicotyl, epicotyledonary, epicranium, epicranius, epicrisis, epicritic, epicrusis, epics, epictesis, Epictetus,

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