白垩纪-古近纪

cretaceously───清白地

the Paleogene───古近纪

cretaceous───adj.白垩纪的；似白垩的；n.白垩纪；白垩系

herbaceous planting───[植]草本植物

sebaceous gland───n.皮脂腺

the Palaeogene───古近纪

the Paleocene───古新世

It says lice are old, predate the Cretaceous-Paleogene boundary, and must have been living on something.───它说明了虱子的历史非常久，在白垩纪-早第三纪过渡期之前，而且也肯定是寄生在某种生物上的。

The mass extinction of terrestrial dinosaurs is the most important evolutionary event across the Cretaceous-Paleogene boundary.───陆生恐龙的绝灭是白垩系-古近系界线事件中最引人注目的。

Detailed geochronological study shows the mainly eruption ages of these volcanic rocks are Late Cretaceous- Paleogene.───年代学研究表明，乍得西南部盆地内火山岩的主体喷发时代为晚白垩世-古近纪。

Affecting factors of Cretaceous-Paleogene shale cap in Jianghan Plain───江汉平原白垩-下第三系泥岩盖层影响因素

• cretaceous paleogene
• cretaceous formation
• cretaceous period