凝灰岩是由石灰岩所组成，它是在其周围湖水里的碳酸盐矿物沉淀的副产品。

Made of limestone, tufa forms as a byproduct of the precipitation of carbonate minerals from surrounding water.

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凝灰岩是由石灰岩所组成，它是在其周围湖水里的碳酸盐矿物沉淀的副产品。

Made of limestone, tufa forms as a byproduct of the precipitation of carbonate minerals from surrounding water.

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