| 释义 |
Toarcian, a. (n.) Geol.|təʊˈɑːsɪən|
[ad. F. Toarcien, f. L. Toarcium, F. Thouars, in western France.]
Applied to a series of strata corresponding in position to the Upper Lias of England, which are extensively developed in Central and Southern France.
[1859Page Handbk. Geol. Terms 49 Upper Lias, Toarcien of d'Orbigny.] 1885Geikie Geol. 802 In Normandy, the Toarcian stage is only about 20 feet thick. 1912Return Brit. Museum 172 Crinoids from the Oxfordian of Var..from the Toarcian of the Balearic Islands. Ibid. 182 Seven Crinoid stem-fragments from the Toarcian rocks of Cabrera, Balearic Is. |