Freeport Formation
The Freeport Formation is a geologic formation in Pennsylvania and Ohio. It preserves fossils dating back to the Late Pennsylvanian period. It is within the Allegheny Group.
| Freeport Formation | |
|---|---|
| Stratigraphic range: Pennsylvanian | |
| Type | Formation |
| Location | |
| Region | Pennsylvania, Ohio |
| Country | United States |
| Type section | |
| Named for | Freeport, Pennsylvania |
| Named by | H. D. Rogers, 1840 |
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