Learn about the time period that took place 65 to 23 million years ago. 3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine ...

The geologic time scale is divided into eons, eras, periods, epochs, and ages ... other animal groups 65.5 million years ago defines the beginning of the Cenozoic era. We are including several pages ...

It is the last period in the Mesozoic Era. It comes after the Jurassic Period and before the Paleogene - the first period of the Cenozoic Era, our current era. It lasted a long time, nearly 80 million ...

Another study focused on the Miocene Climatic Optimum (MCO), a period characterized by a temporary reversal in the long-term cooling trend of the Cenozoic era. This research indicates that ...