Bashkirian
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 Moscovian.
| Bashkirian | |||||||||||||||
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| Chronology | |||||||||||||||
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| Etymology | |||||||||||||||
| Name formality | Formal | ||||||||||||||
| Usage information | |||||||||||||||
| Celestial body | Earth | ||||||||||||||
| Regional usage | Global (ICS) | ||||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||||
| Definition | |||||||||||||||
| Chronological unit | Age | ||||||||||||||
| Stratigraphic unit | Stage | ||||||||||||||
| Time span formality | Formal | ||||||||||||||
| Lower boundary definition | FAD of the Conodont Declinognathodus nodiliferus | ||||||||||||||
| Lower boundary GSSP | Arrow Canyon, Nevada, USA 36.7333°N 114.7778°W | ||||||||||||||
| Lower GSSP ratified | 1996 | ||||||||||||||
| Upper boundary definition | Not formally defined | ||||||||||||||
| Upper boundary definition candidates | FAD of the Conodont Idiognathoides postsulcatus or Declinognathodus donetzianus | ||||||||||||||
| Upper boundary GSSP candidate section(s) | |||||||||||||||
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.
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