It is the first period of the Cenozoic Era, the tenth period of the Phanerozoic and is divided into the Paleocene, Eocene, and Oligocene epochs.

Eocene Epoch, second of three major worldwide divisions of the Paleogene Period (66 million to 23 million years ago) that began 56 million years ago and ended 33.9 million years ago. It follows the …

Starting from a fairly humble position 65 million years ago, primates, horses, bats, pigs, cats, and dogs had all evolved by the close of the period, 23 million years ago.

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", …

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 …

Paleogene Period - an overview | ScienceDirect Topics

Jan 16, 2025 · The "Quaternary" is formally reinstated as a "Period" that contained the Holocene and Pleistocene (and the latter has absorbed what was formerly the last stage of the Pliocene!)

The Paleogene period, the first of the Cenozoic era's two periods, begins at the end of both the Cretaceous period and the Mesozoic era and is followed by the Neogene period, the current and final …

Rise of civilization and agriculture. Extinction of large mammals in northern hemisphere. Modern humans appear. Four major glaciations cause rapid shifts in ecological communities. Extensive …

This timeline of prehistory covers the time from the appearance of Homo sapiens approximately 315,000 years ago in Africa to the invention of writing, over 5,000 years ago, with the earliest records going …