Eocene periods are often divided into early and late periods.

始新世经常被分为早期和晚期。

The Eocene global climate was still relatively warm.

始新世的全球气候仍然比较温暖。

At the beginning of the Eocene, Australia and Antarctica were still connected.

始新世初始，澳大利亚和南极洲仍然相连。

It intruded Eocene sandstones.

它侵入始新世砂岩。

New specimens of Eocene bird Kievornis Averianov et al.

描述了始新世基辅鸟类新标本。

Late Oligocene and the Ulunguhe Fm. Early Eocene to Early Oligocene.

乌伦古河组——早始新世至早渐新世。

The oil shale mainly occurs in the Eocene-Oligocene Youganwo Formation.

油页岩主要赋存于始新渐新统油柑窝组。

The funnel-shaped self-potential curve of the Eocene sands is well marked.

始新统砂层的漏斗形自然电位曲线形态很明显。