ordovician

n.

奥陶纪，奥陶系；

adj.

奥陶纪的；

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;

Glomalean Fungi from the OrdovicianRapid recovery from the Late Ordovician mass extinction.Evenness of Cambrian-Ordovician Benthic Marine Communities in North AmericaSubstrate Affinities of Higher Taxa and the Ordovician RadiationCalibrating the Ordovician Radiation of marine life: implications for Phanerozoic diversity trendsAssociation of orogenic activity with the Ordovician radiation of marine lifeDissecting global diversity patterns: examples from the Ordovician RadiationThe 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 RadiationThe Detection and Importance of Subtle Biofacies within a Single Lithofacies: The Upper Ordovician Kope Formation of the Cincinnati,...