| 释义 |
Tortonian, a. Geol.|tɔːˈtəʊnɪən|
[ad. G. Tortonien n. (K. Mayer 1857, in Verhandl. der allgemeinen schweiz. Ges. für die gesammten Naturwiss. 171), f. Tortona, name of a town in N. Italy: see -ian.]
Of, pertaining to, or designating a stage of the upper (or middle) Miocene in Europe. Also absol., the Tortonian age.
1885A. Geikie Text-bk. Geol. (ed. 2) 873 Italy... The Tortonian stage (3) is made up [of] blue marls, reaching the great thickness of 3900 feet. 1931Gregory & Barrett Gen. Stratigr. xii. 192 The volcanoes of the Rhine began in the Tortonian. 1974Nature 22 Mar. 312/2 We suggest that the separation of Calabria from Sardinia took place in the middle Miocene, and that Tortonian deformation in Sicily indicates a collision that terminates this phase of separation. |
