At the end of the Cretaceous, the geologicalrecord shows that these seaways retreated from the continents back into the major ocean basins.
地质记录显示，在白垩纪末期这些航道从大陆撤退，回到主要的海洋盆地。
2
Several other mass extinctions in the geologicalrecord have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.
地质记录中的其他几次大规模物种灭绝也被认为影响重大，但没有哪一次像白垩纪大灭绝那样夸张。
3
While there are a dozen or more mass extinctions in the geologicalrecord, the Cretaceous mass extinction has always intrigued paleontologists because it marks the end of the age of the dinosaurs.