a. [f. prec. + -ACEOUS.] Having the nature or texture of tufa; consisting of tufa.

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  (Chiefly used of non-volcanic formations: cf. TUFFACEOUS.)

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1811.  Pinkerton, Petralogy, I. 518. Wallerius would perhaps have called it a tufaceous limestone.

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1851.  Woodward, Mollusca, 142. The tufaceous deposits of petrifying wells.

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1876.  Page, Adv. Text-bk. Geol., vii. 131. The tufaceous accumulations round the craters of … volcanoes.

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