Bashkirian
Geologic period
The Bashkirian is in the International Commission on Stratigraphy geologic timescale the lowest stage or oldest age of the Pennsylvanian. The Bashkirian age lasted from 323.2 to 315.2 Ma, is preceded by the Serpukhovian and is followed by the... Wikipedia
Epoch: Pennsylvanian
Occurred: 323.2 (+/- 0.4) million years ago - 315.2 (+/- 0.2) million years ago
Lower boundary definition: FAD of the Conodont Declinognathodus nodiliferus
Lower GSSP ratified: 1996