The Paleogene Period (IPA: / ˈpeɪli.ədʒiːn, - li.oʊ -, ˈpæli -/ 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 …

Paleogene Period, oldest of the three stratigraphic divisions of the Cenozoic Era spanning the interval between 66 million and 23 million years ago.

Apr 27, 2023 · 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 …

At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine reptiles were conspicuously absent from the face of the Earth.

Many of the animals that we know today evolved during the Paleogene Period. On the chart below you will see familiar animals and the epochs when they first appeared.

Oct 30, 2012 · The Paleogene Period* is the first of three periods comprising the Cenozoic Era. The Cenozoic, sometimes known as the "Age of Mammals", as the Mesozoic was the "Age of Reptiles", …

Aug 18, 2025 · The Paleogene Period, spanning approximately 66 to 23 million years ago, marks the initial period of the Cenozoic Era, following the profound Cretaceous-Paleogene (K-Pg) extinction …