Senonianadj.
/sɪˈnəʊnɪən/ Geology.
D'Orbigny's subdivision of the Cretaceous in France and Belgium corresponding to the ‘Upper Chalk with flints’ of British geologists. Also absol.
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the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > secondary or Mesozoic > Cretaceous > specific
Wealden1828
Speeton1829
Neocomian1843
Albian1846
Senonian1850
Urgonian1856
Santonian1869
Maastrichtian1885
Valanginian1885
Vectian1885
Barremian1903
1850 D. T. Ansted Elem. Course Geol. 336 Senonian division of D'Orbigny (Craie blanche).
1879 A. Geikie in Encycl. Brit. X. 360/1 The uppermost member of the Senonian series contains in like manner a blending of well-known Upper Chalk organisms with the Tertiary genera Cypræa, Oliva, and Mitra.
1882 A. Geikie Text-bk. Geol. (1903) vi. iii. §3. 1205 The Senonian stage of N.W. Germany.
1882 A. Geikie Text-bk. Geol. (1903) vi. iii. §3. 1205 The Lower Senonian is marked by the abundance of Actinocamax.
1885 R. Etheridge Stratigr. Geol. & Palæontol. 517 Senonian (Upper Chalk with Flints).
This entry has not yet been fully updated (first published 1912; most recently modified version published online June 2018).
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adj.1850