单词 | palaeogene |
释义 | PalaeogenePaleogenen.adj. Geology. A. n. Chiefly with the. The earlier of the two parts into which the Tertiary period or sub-era is often divided, comprising the Palaeocene, Eocene, and Oligocene epochs (from about 65 million to 23 million years ago); the system of rocks dating from this time. Cf. Neogene adj. and n. ΘΚΠ the world > the earth > structure of the earth > age or period > [noun] > tertiary or Cainozoic > specific Eocene1831 Pliocene1835 Miocene1842 post-Pliocene1852 Oligocene1856 Palaeocene1877 Palaeogene1882 Lutetian1895 Tortonian1931 the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > tertiary or Cenozoic > Palaeogene Palaeogene1882 1882 A. Geikie Text-bk. Geol. vi. iv. 836 Some writers, recognizing a broad distinction between older and younger Tertiary deposits, have proposed a classification into two main groups: 1st, Eocene, Older Tertiary or Palæogene, including Eocene and Oligocene; and 2nd, Younger Tertiary or Neogene. 1951 Philos. Trans. (Royal Soc.) B. 235 315 N[ucula]kasakstanica Ruzin.., from the Aral Sea Palaeogene, has less elevated umbos and a less convex central margin. 1974 Nature 23 Aug. 683/1 The Paleogene..saw the most rapid deposition off the Natal coast from the mid-Cretaceous onwards. 1992 Cambr. Encycl. Human Evol. (1994) v. i. 171 (caption) A composite map of the maximum extent of the oceans during the Palaeogene (65 to 23 million years ago). B. adj. Designating or relating to the Palaeogene. ΚΠ 1892 Athenæum 25 June 829/2 Researches on the British paleogene Bryozoa, of which he recognized 30 species. 1929 Jrnl. Ecol. 17 441 In comparison with the number of palaeogene relicts the neo-endemics in the mesothermic zone of the Rodopes are considered to be few. 1990 P. Kearey & F. J. Vine Global Tectonics viii. 161 The Japanese islands have undergone a clockwise rotation since Palaeogene times, when the major axis of the islands was parallel to the Asian coast. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < n.adj.1882 |
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