1 definition found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
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.
more about tufa
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Lake Atitlan, Guatemala
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