The sediments are rich in clay, which forms when water weathers rocks into fine-grained particles.

这些沉积物富含粘土，粘土是由水流将岩石侵蚀成细小的微粒所形成的。

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The sediments are rich in clay, which forms when water weathers rocks into fine-grained particles.

这些沉积物富含粘土，粘土是由水流将岩石侵蚀成细小的微粒所形成的。

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