What is "bashkirian"

The Bashkirian is in the ICS geologic timescale the lowest stage or oldest age of the Pennsylvanian, The Bashkirian age lasted from to Ma, is preceded by the Serpukhovian and is followed by the Moscovian.

The Bashkirian overlaps with the upper part of the Namurian and lower part of the Westphalian stages from regional European stratigraphy. It also overlaps with the North American Morrowan and Atokan stages and the Chinese Luosuan and lower Huashibanian stages.