| 释义 |
Villafranchian, a. Geol.|vɪləˈfræŋkɪən|
[ad. F. villafranchien (L. Pareto 1865, in Bull. Soc. Géol. de France XXII. 262), f. the name of Villafranca d'Asti in N. Italy, in the vicinity of which exposures of this series occur: see -ian.]
Of, pertaining to, or designating a stratigraphical stage in Europe variously assigned to the Upper Pliocene and the Lower Pleistocene (see quots.). Freq. absol.
1893A. Geikie Text-bk. Geol. (ed. 3) 1016 (table) Villafranchian. 1955G. G. Woodford tr. M. Gignoux's Stratigraphic Geol. x. 558 From the viewpoint of evolution of mammalian faunas, the Burdigalian.. and Villafranchian mark important changes. 1972Gloss. Geol. (Amer. Geol. Inst.) 778/2 Villafranchian, European stage: lower Pleistocene... It is the terrestrial equivalent (in France and Italy) of the marine Calabrian. Before 1948, it was used for the latest division of the Pliocene. 1973Nature 15 June 391/2 Recent data have shown that the continental type Villafranchian is essentially late Pliocene (pre-Calabrian). 1974Encycl. Brit. Micropædia X. 436/3 It is likely that the Villafranchian includes within it the Plio-Pleistocene boundary. Ibid. Macropædia XIV. 568/2 The Villafranchian fauna was..greatly modified by extinctions and new additions. |