tufa

tu·fa  (tf, ty-)

n.

1. The calcareous and siliceous rock deposits of springs, lakes, or ground water.

2. See tuff.

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[Obsolete Italian tufa, tufo, from Latin tfus.]

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tu·faceous (-fshs) adj.

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tufa [ˈtjuːfə]

n

(Earth Sciences / Minerals) a soft porous rock consisting of calcium carbonate deposited from springs rich in lime Also called calc-tufa

[from Italian tufo, from Late Latin tōfus]

tufaceous  [tjuːˈfeɪʃəs] adj

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tufa  (tf)

A soft, friable, and porous sedimentary rock consisting of calcium carbonate and formed by the evaporation of water, especially at the mouth of a hot spring or on a drying lakebed. It is similar to, but harder than, travertine.

Thesaurus

Noun	1.	tufa - a soft porous rock consisting of calcium carbonate deposited from springs rich in lime calc-tufa rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"
	2.	tufa - hard volcanic rock composed of compacted volcanic ash tuff volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth

Translations

tufa [ˈtjuːfə] N → toba f