The 'Bartonian' (also known as the 'Auversian') is a
stage of the middle
Eocene Epoch. It spans the time between 40.4 ± 0.2
Ma and 37.2 ± 0.2 Ma (million years ago).
See Also
★
List of fossil sites ''(with link directory)''
References
★
GeoWhen Database - Bartonian