Helderberg Formation
The Helderberg Formation is a geologic formation in Pennsylvania, Maryland and West Virginia. It preserves fossils dating back to the Devonian period.
| Helderberg Formation Stratigraphic range: Devonian | |
|---|---|
| Type | Formation |
| Location | |
| Country | United States |
| Extent | Maryland, Pennsylvania, West Virginia |
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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