Eocene series的用法和樣例：
例句
- The funnel-shaped self-potential curve of the Eocene sands is well marked.
始新統砂層的漏斗形自然電位曲線(xiàn)形態(tài)很明顯。 - The first spreading cycle resulted in the formation of Wenchang mudstone, Eocene,which is the important and main source rock of the basin.
第一擴張旋回中形成的始新統文昌組泥巖是珠江口盆地的主要烴源巖。
