单词 | pliensbachian |
释义 | Pliensbachiann.adj. Geology. A. n. A stage of the Lower Jurassic in Europe lying above the Sinemurian and below the Toarcian; the geological age during which this was deposited, from about 192 to 184 million years ago. ΘΚΠ the world > the earth > structure of the earth > age or period > [noun] > secondary or Mesozoic > Jurassic > Jurassic spec. Oxfordian1849 Callovian1856 Pliensbachian1903 the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > secondary or Mesozoic > Jurassic > specific Oxford clay1812 cornbrash1813 Kellaways1813 Portland oolite1814 coral-rag1816 oolite1816 Oxford oolite1818 Kimmeridge clay1830 lias1833 Portland sand1836 skull-cap1839 Solenhofen slate1841 Stonesfield slate1855 Callovian1856 Tithonian1869 coralline oolite1871 Lincolnshire limestone1873 Ampthill Clay1877 Aalenian1882 Pliensbachian1903 1903 Q. Jrnl. Geol. Soc. 59 455 In some districts—East Gloucestershire for instance—only a few feet of Toarcian are found separating the Inferior Oolite (Aalenian) from the Middle Lias (Pliensbachian). 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) iv. 118 In the Lower Pliensbachian there are a number of forms the early whorls of which are of planulate type. 1975 A. Hallam Jurassic Environments ii. 13 No zonal subdivision for the Pliensbachian of southern Europe as a whole has yet been satisfactorily achieved. 1978 Nature 13 July 131/1 The initial Jurassic transgression here took place in the Pliensbachian. 1999 Geol. Balcanica 29 3 Later on (at the end of the Sinemurian and in the beginning of the Pliensbachian) the calcareous silts began to prevail over the terrigenous sediments. B. adj. Of or relating to the Pliensbachian. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > secondary or Mesozoic > Jurassic > specific Purbeck stone1410 Oxfordian1845 Portlandian1845 Callovian1851 Kimmeridgian1851 Bathonian1858 Sinemurian1863 Tithonian1869 Toarcian1885 Kellovian1888 Aalenian1896 Pliensbachian1952 1952 Philos. Trans. (Royal Soc.) B. 236 281 I was prepared for this ammonite to turn out to be of Sinemurian or Lower Pliensbachian age. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) i. 27 Furcirhynchia is a Pliensbachian genus. 2003 Micropaleontology 49 27 On the north-eastern margin of the Danish Basin..the Upper Pliensbachian to Toarcian succession represents the early phase of delta outbuilding. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.adj.1903 |
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