Sinemurianadj.
/sɪnəˈmjuːrɪən/ Geology.
Of, pertaining to, or designating a stage of the Lower Jurassic in Europe which in the modern division is next below the Pliensbachian. Frequently absol.
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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
1863 J. D. Dana Man. Geol. iii. iii. 449 The Sinemurian (Lower Lias, named from the locality at Sémur).
1888 J. 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.
1928 E. Neaverson Stratigr. Palaeontol. xv. 331 The most familiar Sinemurian brachiopod is the broad-plaited Spiriferina walcotti.
1969 G. M. Bennison & A. E. 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.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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adj.1863