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 …

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", …

The Paleogene period is most notable as being the time in which mammals evolved from small, simple forms into diverse animals in the wake of the mass extinction that ended the preceding Cretaceous …

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.

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 …

The Paleogene Period is defined as the geological interval spanning from 66 to 23 million years ago, encompassing the Paleocene, Eocene, and Oligocene epochs, during which significant climatic …

Paleogene Period Diversification of flowering plants and mammals The Paleogene Period (66–23 Ma) is in the Cenozoic Era, occurring after the Mesozoic Era, and before the Neogene Period.

Feb 5, 2026 · Paleogeography and Geology of the Paleogene: Paleocene-Eocene: continuation of Laramide Orogeny in Cordillera (began in Maastrichtian, Late Cretaceous). Uplifted blocks and down …