| 单词 | marl slate |
| 释义 | > as lemmasmarl slate marl slate n. [after German Mergelschiefer] Geology (a) a fissile calcareous rock; calcareous shale; (b) spec. (usually Marl Slate) a stratigraphic division of the Upper Permian system of England, corresponding to the Kupferschiefer of continental Europe. ΚΠ 1804 R. Jameson Syst. Mineral. I. 529 (heading) Bituminous marle slate. 1852 C. Lyell Man. Elem. Geol. (ed. 4) ii. 13 Marl slate bears the same relation to marl which slate bears to clay, being a calcareous shale. 1877 A. H. Green Geol. for Students: Physical Geol. (ed. 2) ii. §6. 72 If the rock [sc. marl] splits into plates it is called marl-slate. 1903 A. Geikie Text-bk. Geol. (ed. 4) II. 1071 Nine genera of fishes have been obtained chiefly in the Marl Slate. 1979 D. L. Dineley Fossils vii. 151 From the Marl Slate of Nottinghamshire many species of fossil fish were once obtained. 1993 Proc. Yorkshire Geol. Soc. 49 229 (title) A new specimen of Protorosaurus..from the Marl Slate (late Permian) of Britain. < as lemmas |
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