| 释义 |
Senonian, a. Geol.|sɪˈnəʊnɪən|
[ad. F. sénonien, f. L. Senonēs, a people of central Gaul.]
D'Orbigny's subdivision of the Cretaceous in France and Belgium corresponding to the ‘Upper Chalk with flints’ of British geologists. Also absol.
1850Ansted Elem. Geol., Min., etc. 336 Senonian division of D'Orbigny (Craie blanche). 1879Geikie 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― Text-bk. Geol. vi. iii. §3 (1903) 1205 The Senonian stage of N.W. Germany. Ibid., The Lower Senonian is marked by the abundance of Actinocamax. 1885Etheridge Stratigraph. Geol. & Palæontol. 517 Senonian (Upper Chalk with Flints). |