| 释义 |
Volgian, a. Geol.|ˈvɒlgɪən|
[f. as Volga + -ian.]
Of, pertaining to, or designating a stage of the Upper Jurassic and Lower Cretaceous in Russia. Also absol.
1893A. Geikie Text-bk. Geol. (ed. 3) 919 Some of the recognized [Jurassic] life-zones of western Europe can be detected in Russia... [These include] Volgian, consisting of green, brown and dark sandstones and sands. 1955E. Neaverson Stratigraphical Palaeont. (ed. 2) xii. 473 The lower beds of the Russian Volgian stage..may be correlated with the Upper Kimmeridge Clay of England. 1978Nature 13 July 132/2 The fault-controlled stepwise submergence of the block-faulted basin culminated in Middle Volgian times with the most important Mesozoic phase of block-faulting in the region. |