The Eocene is a formally defined epoch of the Paleogene Period within the Cenozoic Era, spanning approximately 56 to 34 million years ago, characterized by globally warm climates and high atmospheric CO₂ levels. It is subdivided into the Ypresian, Lutetian, Bartonian, and Priabonian ages based on biostratigraphic markers and magnetostratigraphy. The Eocene saw major diversification of modern mammalian orders, early primates, and marine fauna, as well as significant tectonic reconfigurations influencing ocean circulation. Notable climatic events include the Early Eocene Climatic Optimum and progressive cooling that initiated the transition toward Antarctic glaciation by the end of the epoch.
Science never stops. Get notified about trending stories.
