Pennsylvanian epoch of geologic time, between 323.2 and 298.9 million years ago during the Carboniferous Period.
Also known as the Upper Carboniferous−Late Carboniferous epoch.
This category has the following 5 subcategories, out of 5 total.
The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes (learn more).