Eocene是什么意思？

Eocene

英[ˈi:əusi:n] 美[ˈiəˌsin]

• adj. 始新系的，始新世的；
• n. 始新世，始新系；

例句

• Maoxing block saliferous strata are mainly in 4 th Member, Funing Formation , Eocene Series. 茅兴块段含盐系地层主要为始新统阜宁组四段.
• There are four hydrocarbon source rocks, Palaeocene, Eocene, Oligocene and Miocene. 西湖凹陷发育古新统 、 始新统 、 渐新统及中新统四大烃源岩系.
• These showed an evolution of increasing diversity through to the Eocene. 一直到始新世,生物多样性都在不断地提高.
• 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.

英英词典释义

• Noun
  1. from 58 million to 40 million years ago; presence of modern mammals