Found 2 items, similar to tufa.
English → English (WordNet) Definition: tufa tufa n 1: a soft porous rock consisting of calcium carbonate deposited from springs rich in lime [syn: calc-tufa] 2: hard volcanic rock composed of compacted volcanic ash [syn: tuff]
English → English (gcide) Definition: Tufa Tufa \Tu"fa\, [It. fufo soft, sandy stone, L. tofus, tophus. Cf. Tofus, Toph, and Tophin.] (Min.) (a) A soft or porous stone formed by depositions from water, usually calcareous; -- called also calcareous tufa. (b) A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria. [1913 Webster]