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Tufa 1

Definition: A soft or porous stone formed by depositions from water, usually calcareous; called also calcareous tufa.

Tufa 2

Definition: A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria.

tufa 3

Definition: hard volcanic rock composed of compacted volcanic ash

tufa 4

Definition: a soft porous rock consisting of calcium carbonate deposited from springs rich in lime

 

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