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Dictionary

tu•fa

Pronunciation: (tOO'fu, tyOO'-), [key]
—n. Geol.
1. Also called calcareous tufa, calc-tufa, calc-tuff. a porous limestone formed from calcium carbonate deposited by springs or the like. Cf. travertine.
2. (not in technical use) tuff².

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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tuff

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