| 释义 |
Aptian, a. (n.) Geol.|ˈæptɪən|
[f. place-name Apt (Vaucluse, France) + -ian.]
Epithet of a division of the Lower Cretaceous formation in France and Belgium; belonging to or found in this, as a fossil.
1864J. D. Dana Man. Geol. (ed. 2) iii. iii. 480 The subdivisions of the Cretaceous are variously named in different parts of Europe. Lower Cretaceous.—Superior Neocomian of D'Orbigny (the Wealden being the inferior); also his Aptian. Ibid. 776/2 Aptian group. 1885A. Geikie Geol. (ed. 2) 831 In northern France the Aptian stage is chiefly clay. 1921Brit. Mus. Return 151 Aptian fossils from Whale's Head. |