Pennsylvanian
| Use attributes for filter ! | |
| Periods | Carboniferous |
|---|---|
| Ages | Bashkirian |
| Moscovian | |
| Kasimovian | |
| Gzhelian | |
| Chronolog unit | Subperiod |
| Lower boundari definit | First appearance of the Conodont Declinognathodus nodiliferus |
| Lower boundari gssp | Nevada |
| United States | |
| Lower gssp ratifi | 1996 |
| Upper boundari gssp | Aidaralash |
| Ural Mountains | |
| Kazakhstan | |
| Date of Reg. | |
| Date of Upd. | |
| ID | 4035825 |
About Pennsylvanian
The Pennsylvanian is, in the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period. It lasted from roughly 323.2 million years ago to 298.9 million years ago.
Pennsylvanian Photos
