Geology. Designating partly crystalline rocks believed (according to Wernerian theory) to be intermediate between supposedly primitive crystalline…
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| 释义 | the world > the earth > structure of the earth > age or period > [adjective] > primary or Palaeozoic > Silurian (3) transition1800 Geology. Designating partly crystalline rocks believed (according to Wernerian theory) to be intermediate between supposedly primitive crystalline… Silurian1835 Geology. Originally: the name given to the system or series of Palæozoic rocks lying immediately below the Devonian or Old Red Sandstone; of or… Gotlandian1909 Of or pertaining to the geological system between the Ordovician and the Devonian or to the geological period during which it was deposited. Also a… |
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