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tufa

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson 0.01 sec.
tufa: see travertine travertine , form of massive calcium carbonate, CaCO3, resulting from deposition by springs or rivers. It is often beautifully colored and banded as a result of the presence of iron compounds or other (e.g., organic) impurities.
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tufa
a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
tufa [′tü·fə]
(geology)
A spongy, porous limestone formed by precipitation from evaporating spring and river waters, often onto leaves and stems of neighboring plants. Also known as calcareous sinter; calcareous tufa.
tufa
A porous limestone used in masonry construction.
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Moreover, there is a variant called tufa, which is similar to travertine but more porous.
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The soft, volcanic tufa rock was an especially workable, yet durable, material that was burrowed out over the course of nearly three centuries.
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Tufa casting and sand casting are other two techniques that are utilized for manufacturing of the bracelets by Navajo tribe in the southwest America.
Types of Native American Bracelets by michael russell / Fashion, accessories and textiles community
 
 
 
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