A Palaeozoic rock or stratum. Usually in plural.
| 单词 | θ5376 |
| 释义 | the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > primary or Palaeozoic (21) Palaeozoic1855 A Palaeozoic rock or stratum. Usually in plural. Rhenan1885 The Rhenan stage. Subcategories:— Silurian (8) — carboniferous spec. (5) — Permian (6) |
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