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单词 tuffaceous
释义 tuffaceous, a.|tʌˈfeɪʃəs|
[f. tuff n. + -aceous.]
‘Having the properties of or composed of volcanic tuff’ (Cent. Dict. Suppl. 1909); distinguished from tufaceous in the specific sense.
1882Geikie Textbk. Geol. ii. ii. vi. 164 Tuffs passing gradually into shale, limestone, sandstone, &c. The intermediate varieties have been called ashy shale, tuffaceous shale, or shaley tuff, &c.
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