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tufa

[too-fuh, tyoo-] /ˈtu fə, ˈtyu-/
noun, Geology
1.
Also called calcareous tufa, calc-tufa, calc-tuff. a porous limestone formed from calcium carbonate deposited by springs or the like.
Compare travertine.
2.
(not in technical use) tuff 2 .
Origin
1760-1770
1760-70; < Italian tufo < Latin tōfus
Related forms
tufaceous
[too-fey-shuh s, tyoo-] /tuˈfeɪ ʃəs, tyu-/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for tufa
  • The tufa towers formed entirely underwater and have been exposed due to the decline in lake level.
  • tufa, deposited by a combination of organic and inorganic processes, is widespread.
  • tufa is a rock formation composed of calcium carbonate that forms underwater in places where lake water mixes with spring water.
  • When the lake level falls, the tufa formations are exposed.
British Dictionary definitions for tufa

tufa

/ˈtjuːfə/
noun
1.
a soft porous rock consisting of calcium carbonate deposited from springs rich in lime Also called calc-tufa
Derived Forms
tufaceous (tjuːˈfeɪʃəs) adjective
Word Origin
C18: from Italian tufo, from Late Latin tōfus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tufa
tufa
"a porous rock," 1770, from It. tufa, from L. tophus "loose, porous volcanic rock," an Oscan-Umbrian loan-word.
Online Etymology Dictionary, © 2010 Douglas Harper
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tufa in Science
tufa
  (t'fə)   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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7
8
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