Small order of primitive ungulates of the paleocene and eocene .
生活于古新世至始新世的小型原始有蹄动物目。
Lower and middle eocene calcareous nannofossils from the southwestern continental shelf basin of the east china sea .
东海陆架盆地西南部海相始新统钙质超微化石。
The early whale swam polar waters during the eocene period , some 49 million years ago . Its age suggests fully aquatic whales evolved from their mammalian ancestors more rapidly than previously thought , said researcher thomas m rs , paleozoologist at the swedish museum of natural history .
Since tha latest of cretaceous , the xiihu sag had been undergoing rifting stage during the paleocene and the eocene , inversion stagc during the oligocene and the miocene , and regional subsidence stage during the pliocene and the quaternary .
And third , there is geological evidence for plant extinctions in the eocene .
第三,我们已经收集到有关始新世时代植物灭绝的地质证据。
Whichever way you look at the eocene enigma , it is bad news for life on earth .
无论用何种途径来观察始新世温室的这个谜,都对地球上生命带来不好的消息。
At 95 % complete , the fossil provides the most complete understanding of the paleobiology of any eocene primate so far discovered .
这具化石完整程度达95%,是迄今为止人类发现的、有助于了解始新世灵长类古生物学的最完整化石。
The specimen was excavated by private collectors in 1983 from the messel shale pit , a shale quarry near darmstadt , germany , that has yielded many fossils of eocene life , including other primitive primates .