| 单词 | pteropod shell |
| 释义 | > as lemmaspteropod shell pteropod shell n. ΚΠ 1876 Proc. Royal Soc. 1875–6 24 499 A blue mud containing:—A great many pelagic Foraminifera and some Pteropod shells. 1987 N. N. Rabalais & D. F. Boesch in D. F. Boesch & N. N. Rabalais Long-Term Environmental Effects Offshore Oil & Gas Devel. iii. 100 The substrate on the upper slope grades to a fine muddy sand (1.5 to 4.2% silt) mixed with pteropod shells. < as lemmas |
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