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Tufaceous

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
tu·fa  (tf, ty-)
n.
1. The calcareous and siliceous rock deposits of springs, lakes, or ground water.
2. See tuff.
[Obsolete Italian tufa, tufo, from Latin tfus.]
tu·faceous (-fshs) adj.


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I brought away specimens of one of the tufaceous layers of a pinkish colour and it is a most extraordinary fact, that Professor Ehrenberg [5] finds it almost wholly composed of matter which has been organized: he detects in it some siliceous-shielded fresh-water infusoria, and no less than twenty-five different kinds of the siliceous tissue of plants, chiefly of grasses.
The Voyage of the Beagle by Darwin, Charles View in context
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