| 单词 |
Sinemurian |
| 释义 |
Sinemurian, a. Geol.|sɪnəˈmjuːrɪən|
[ad. F. Sinémurien (A. d'Orbigny Paléont. Française. Mollusques et Rayonnés Fossiles. Terrains Jurassiques (1842–9) I. 604), f. L. Sinemurum, ancient name of Sémur-en-Auxois, a town in Côte d'Or department, France + -ien -ian.]
Of, pertaining to, or designating a stage of the Lower Jurassic in Europe which in the modern division is next below the Pliensbachian. Freq. absol.
1863J. D. Dana Man. Geol. iii. iii. 449 The Sinemurian (Lower Lias, named from the locality at Sémur). 1888J. Prestwich Geol. II. xvi. 242 M. Gosselet includes the Lower- and Infra-Lias in one division—the Sinemurian, which he divides into two subdivisions—the Upper Sinemurian and the Lower Sinemurian or Hettangian. 1928E. Neaverson Stratigraphical Palaeont. xv. 331 The most familiar Sinemurian brachiopod is the broad-plaited Spiriferina walcotti. 1969Bennison & Wright Geol. Hist. Brit. Isles xiii. 289 A cyclic sequence of thin lime⁓stones and clays of Blue Lias type comprise the Hettangian followed by clays chiefly, although locally limestones may occur as high as the top of the Sinemurian. |
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