clay particularly suited to being shaped; spec. (clay from) any of the middle group of the Eocene clay beds, immediately underlying the London clay…
| 单词 | θ5394 |
| 释义 | the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > tertiary or Cenozoic > Eocene > specific (4) plastic clay1811 clay particularly suited to being shaped; spec. (clay from) any of the middle group of the Eocene clay beds, immediately underlying the London clay… calcaire silicieux1833 In calcaire grossier and calcaire silicieux (lit. coarse and siliceous limestone) the French names of two Middle Eocene strata of the Paris basin… Woolwich-beds1859 (see quot. 1859). coryphodon bed1895 A fossil mammal of the genus of this name: so called because the cusps of their teeth are developed into points. Also attributive, as coryphodon bed… |
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