Freeport Formation Explained

The Freeport Formation is a geologic formation in Pennsylvania and Ohio. It preserves fossils dating back to the Late Pennsylvanian period.^[2] It is within the Allegheny Group.

References

Web site: Fossilworks: Gateway to the Paleobiology Database. ((Various Contributors to the Paleobiology Database)). 17 December 2021. 25 March 2022. https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home. live.

Rogers, H. D., 1840, Fourth annual report of the geological survey of the state of Pennsylvania. Harrisburg, PA, 215 p. (https://books.google.com/books?id=AJ44AQAAMAAJ)
https://ngmdb.usgs.gov/Geolex/Units/Freeport_1733.html Freeport