| 释义 |
Tongrian, a. Geol.|ˈtɒŋgrɪən|
[f. Tongres, in Belgium, where developed + -ian.]
Name for marine strata of the Lower Oligocene of Belgium.
1883[see rupelian]. 1885Geikie Text-bk. Geol. (ed. 2) 864 The Tongrian deposits contain an abundant marine fauna = the Egeln beds of Germany. 1885Lyell Elem. Geol. xv. 202 The lower division [of the Oligocene], or Tongrian, includes the sands in the neighbourhood of Tongres, and..corresponds with the upper part of the Gypseous series of Montmartre, and with the Headon series of England. |