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calc-sinter

calc-sinter Min.
  (ˈkælkˈsɪntə(r))
  [ad. Ger. kalk-sinter, f. kalk lime (a. L. calc-em; see calc-) + sinter slag.]
  A hard crystalline deposit from springs which hold carbonate of lime in solution.

1823 W. Buckland Relig. Diluv. 115 Firmly cemented together by stalagmitic infiltrations of calc-sinter. 1830 Lyell Princ. Geol. I. 200 One of these springs..has formed, by its incrustations, an elevated mound of solid travertin, or calc-sinter. 1850 J. Leitch Muller's Anc. Art §268. 300 In Greece..tufa and calc-sinter..were also employed.

Oxford English Dictionary

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