The site contains 635 animal tracks from the Early Pleistocene geological period, ... detailed that the fossil footprints are impressed on a muddy stratum from the Oligocene, ...

Faunal turnover. The Eocene-Oligocene boundary was a global cooling event that occurred about 34 million years ago, causing ...

This event saw large numbers of marine life and mammals across the Earth—including what is now Europe—go extinct around 34 million years ago, between two eras called the Eocene and Oligocene.

Now researchers have confirmed that an ancient dolphin that lived during the Oligocene Epoch — 33.9 million to 23 million years ago — was the first cetacean (a type of mammal) using ...

“They have a very strange morphology. They’re like a combination of different animals,” said Florent Rivals, an evolutionary paleoecologist at the Catalan Institute of Human Paleoecology and ...

This previously unseen extinction bridges two geologic epochs: the Eocene (55.8 million to 33.9 million years ago) and the Oligocene (33.9 million to 23 million years ago).

The newly identified species, Paraceratherium linxiaense — named after its discovery spot in the Linxia Basin in Gansu province — towered over other animals during its lifetime. The 26-foot ...

The Eocene/Oligocene boundary, at about 33.7 Myr ago, marks one of the largest extinctions of marine invertebrates in the Cenozoic period1. For example, turnover of mollusc species in the US Gulf ...

The new species, named Scyliorhinus weemsi after paleontologist Dr. Robert Weems, lived nearly 30 million years ago during the Oligocene Epoch of the Paleogene Period.