Geology. = Rhaetian, n. 3. Also (chiefly in plural): rocks or strata of the Rhaetian stage (now rare).
| 单词 | θ5461 |
| 释义 | the world > the earth > structure of the earth > age or period > [noun] > secondary or Mesozoic > Triassic-Jurassic transition (3) Rhaetic1862 Geology. = Rhaetian, n. 3. Also (chiefly in plural): rocks or strata of the Rhaetian stage (now rare). Rhaetian1883 Geology. The uppermost (youngest) of the three stages constituting the Upper Triassic, lying above the Norian stage and below the Hettangian… Carnic1948 Geology. Also Karnic. = Carnian, adj. 2. Also absol. Now rare. |
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