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Tufa

tufa

(Science: chemical) A soft or porous stone formed by depositions from water, usually calcareous; called also calcareous tufa.

A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria.

Origin: It. Fufo soft, sandy stone, L. Tofus, tophus. Cf. Tofus, Toph, and Tophin.


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