| 单词 | forest-bed |
| 释义 | > as lemmasforest-bed forest-bed n. Geology a stratum originating from a primæval forest. ΘΚΠ the world > the earth > structure of the earth > structural features > sedimentary formation > [noun] > stratum > stratum by constitution > organic remains or fossils moorlog1655 coal plant1695 leaf bed1697 plant bed1784 oyster bed1833 stem-bed1853 forest-bed1861 starfish bed1861 fish-bed1869 insect-bed1893 lagerstätte1972 1840 C. Lyell in London, Edinb. & Dublin Philos. Mag. 3rd Ser. 16 377 A general subsidence..must have taken place..in order to explain the submergence and burial of the trees of which the stools are found in situ; and this forest bed could not have been brought up again..to the level of low water, without a subsequent upheaval.] 1861 Geologist 4 70 The dark sandy clay, known as the Forest bed, from the abundance..of stems and trunks of trees found in and on it. 1865 D. Page Handbk. Geol. Terms (ed. 2) 207 Forest-bed, the name given by English geologists to a stratum which underlies the Glacial Drift at Cromer in Norfolk. < as lemmas |
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