The Paleogene Period (IPA: / ˈ p eɪ l i. ə dʒ iː n,-l i. oʊ-, ˈ p æ l i-/ PAY-lee-ə-jeen, -⁠lee-oh-, PAL-ee-; also spelled Palaeogene or Palæogene) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period 66 Ma (million years ago) to the beginning of the Neogene Period 23.04 Ma.

早第三纪（Paleogene Period）距今6500万年～距今2330万年。早第三纪，就是古近纪。同是新生代中最早的一个历史阶段，又称老第三纪，原是第三纪的一个亚纪。它的原意是指近代生物的发生和启蒙时期。早第三纪约开始于6500万年前，结束于2330万年前。

2025年2月21日 · Paleogene Period, oldest of the three stratigraphic divisions of the Cenozoic Era spanning the interval between 66 million and 23 million years ago. Paleogene is Greek meaning “ancient-born” and includes the Paleocene (Palaeocene) Epoch (66 million to 56 million years ago), the Eocene Epoch (56 million to 33.9 million years ago), and the ...

Learn about the time period that took place 65 to 23 million years ago. At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine reptiles were...

古近系（Paleogene System），曾用名老第三系（Eogene System）。 古近纪时期形成的地层称为古近系。 古近系自下而上包括古新统、始新统和渐新统。

2023年4月27日 · The Paleogene Period is the first of three periods in the Cenozoic Era. The Paleogene represents less than 1% of geologic time; however, the rocks of this period were deposited quite recently and are, therefore, at or near Earth’s surface.

2012年10月30日 · The Paleogene sees the rapid filling of the environment following the K/T extinction, though it took more than two million years for the Earth’s ecosystems to recover from this event. On land primitive mammals and birds began to spread rapidly.

2019年2月17日 · Instead the terms Paleogene and Neogene, in their modern form, are the preferred way to subdivide the Cenozoic Era. While it is generally accepted that the Tertiary began at the end of the Cretaceous and that the Quaternary continues until the modern day, there has never been a good agreement on where the Tertiary ends and the Quaternary begins.

1990年6月，就在阿尔瓦雷斯发表声明的20年后，地质学家们在墨西哥希克苏鲁伯镇附近的尤卡坦半岛北角发现了一个巨大的陨石坑，这个陨石坑因此得名为“ 希克苏鲁伯陨石坑 ”。 通过对这个陨石坑和其他遗迹的分析，我们得以还原66.043百万年前浩劫发生的 那一刻，以及紧随其后数十年的情景。 Stage1：撞击前夕. 白垩纪末期 全球持续变冷，海平面下降。 晚白垩世海拔高峰值（80 Ma） 为50-70米，随之而来的是坎帕——马斯特里赫特阶长期的跌落。 在早白垩纪—中白垩 …

2019年1月31日 · The Paleogene was the first period of the Cenozoic Era (65 million years ago to the present), followed by the Neogene period (23-2.6 million years ago), and is itself divided into three important epochs: the Paleocene (65-56 million years ago), the Eocene (56-34 million years ago) and the Oligocene (34-23 million years ago).