Bashkirian

The Bashkirian is in the ICS geologic timescale the lowest stage or oldest age of the Pennsylvanian, the youngest subsystem of the Carboniferous. The Bashkirian age lasted from 323.2 ± 0.4 to 315.2 ± 0.2 Ma, is preceded by the Serpukhovian and is followed by the Moscovian.