ordovician
英 [ˌɔ:dəˈviʃən] 美 [ˌɔrdəˈvɪʃən]

n.

奥陶纪，奥陶系；

adj.

奥陶纪的；

英英释义

ordovician[ ,ɔ:dəu'viʃən; -ʃiən ]

• n.from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

  同义词：Ordovician period

词组短语

middle ordovician[地]中奥陶世

双语例句

用作名词(n.)

1. This was the result from the large-scale regression in the Late Ordovician.
   这是奥陶纪晚期大规模海退的结果。
2. Major hydrocarbon source rocks are in the Cambrian and Ordovician.
   寒武-奥陶系烃源岩是该区主力烃源岩;

权威例句

Glomalean Fungi from the Ordovician
Rapid recovery from the Late Ordovician mass extinction.
Evenness of Cambrian-Ordovician Benthic Marine Communities in North America
Substrate Affinities of Higher Taxa and the Ordovician Radiation
Calibrating the Ordovician Radiation of marine life: implications for Phanerozoic diversity trends
Association of orogenic activity with the Ordovician radiation of marine life
Dissecting global diversity patterns: examples from the Ordovician Radiation
The new chronostratigraphic classification of the Ordovician System and its relations to major regional series and stages and to δ1...
A New Look at Age and Area: The Geographic and Environmental Expansion of Genera During the Ordovician Radiation
The Detection and Importance of Subtle Biofacies within a Single Lithofacies: The Upper Ordovician Kope Formation of the Cincinnati,...