| 单词 | phosphatic nodule |
| 释义 | > as lemmasphosphatic nodule phosphatic nodule n. Geology a fossilized nodule consisting chiefly of calcium phosphate of animal origin, occurring in certain marine deposits and formerly used as a source of fertilizer. ΚΠ 1860 N. Amer. Rev. Apr. 485 It is thought that phosphatic nodules and bituminous matter have been discovered. 1910 J. A. Murray Soils & Manures viii. 213 Quantities of phosphatic nodules are also found in the Suffolk Crag and in various parts of the Green Sand. 1995 Philos. Trans. (Royal Soc.) B. 347 306/2 A small number of isolated sclerites, recovered from phosphatic nodules in the ‘Green Shales’. < as lemmas |
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