form of terrestrial limestone deposited around mineral springs, especially hot springs From Wikipedia, the free encyclopedia
Travertine is a terrestrial sedimentary rock. It is a natural chemical precipitate of carbonate minerals; aragonite or calcite. This happens from solution in ground and surface waters, and/or geothermally heated hot-springs.[1][2] Similar (but extremely porous) deposits formed from ambient-temperature water are known as tufa.
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