Bartonian

The Bartonian is a specific time period in Earth's history. It is part of the middle Eocene Epoch, which is a way scientists divide up very old times. The Bartonian Age lasted from about 41.03 million years ago to 37.71 million years ago.

This time period comes after the Lutetian and before the Priabonian. Scientists use these names to help them understand and talk about different parts of Earth's long past. The Bartonian helps us place many important changes in plants, animals, and the world during this ancient time.

Stratigraphic definition

The Bartonian Stage was introduced in 1857 by a Swiss scientist named Karl Mayer-Eymar. The name comes from a group of rocks found in the Hampshire Basin in southern England, near a village called Barton-on-Sea.

This stage is defined by special tiny fossils found in the rocks. It overlaps with several other animal age names used in different parts of the world.