| 单词 | stem-bed |
| 释义 | > as lemmasstem-bed stem-bed n. Geology a stratum containing stems of trees. 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 1853 J. Morris in Q. Jrnl. Geol. Soc. 9 338 Clays between the above [oyster-bed and marly rock] and the stem-bed. < as lemmas |
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