ordovician是什么意思

2024-01-28 06:32:17

ordovician

美英

n. 奥陶纪；奥陶系

adj. 奥陶纪的

近义词：Ordovicianperiod，

Noun

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

用作名词(n.)

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。
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;