词族 · Oligocene
词形变化
英语词源
- Oligocene (adj.)
- 1856, "pertaining to the Tertiary period between the Eocene and the Miocene," coined in German (1854) by Heinrich Ernst von Beyrich, from oligo- "small, little, few" + -cene. So called because few modern fossils were found in Oligocene rocks.
权威例句
- 1. Oligocene erosion had truncated the sediments draped over the dome.
- 覆盖于穹丘上的沉积岩为渐新世侵蚀所截削.
- 2. Beibu Wan Basin was a lake in the middle Eocence - Lower Oligocene.
- 北部湾 盆地在中始新世至早渐新世是一个湖泊.
- 3. 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.
- 4. Paleogene Oligocene Linhe formation ( E _ 3 J ) and Eocene Wulate formation ( E _ 2 wl ).
- 下第三系渐新统临河组 ( E_3l ),始新统乌拉特组 ( E_2wl ).
- 5. The differences between Oligocene series in the east and west are demonstrated.
- 指出了盆地东部和西部渐新统存在的差异.