| 释义 |
calc-tuff Min.|ˈkælkˈtʌf|
[see calc-.]
A porous deposit of carbonate of lime, formed by the waters of calcareous springs; calcareous tufa.
1822Mrs. Lowry Convers. Min. II. 265 Acidiferous Earthy Minerals..Calc-tuff. 1857Page Adv. Text-bk. Geol. xx. (1876) 420 Calc-tuff..is an open, porous, and somewhat earthy deposition of carbonate of lime from calcareous springs. 1863Watts Dict. Chem. I. 722 Calctuff, an alluvial form of carbonate of calcium. |