Geology. Originally: the name given to the system or series of Palæozoic rocks lying immediately below the Devonian or Old Red Sandstone; of or…
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| 释义 | the world > the earth > structure of the earth > age or period > [noun] > primary or Palaeozoic > Silurian (2) Silurian1879 Geology. Originally: the name given to the system or series of Palæozoic rocks lying immediately below the Devonian or Old Red Sandstone; of or… Subcategories:— specific (1) |
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