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tufa Idioms & Phrases


calc-tufa

  • noun a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
    tufa.
WordNet
Calc"-tu`fa noun
Etymology
G. kalk (l. calx) lime + E. tufa.
Definitions
  1. See under Calcite.
Webster 1913

Trap tufa, Trap tuff

  • a kind of fragmental rock made up of fragments and earthy materials from trap rocks.
Webster 1913