Liberty Formation on:
[Wikipedia]
[Google]
[Amazon]
The Liberty Formation is a geologic formation in Ohio and Indiana. It preserves 
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the Ordovician period.
See also
* List of fossiliferous stratigraphic units in Ohio * List of fossiliferous stratigraphic units in IndianaReferences
* Ordovician Kentucky Ordovician Ohio Ordovician Indiana Ordovician southern paleotemperate deposits Ordovician southern paleotropical deposits {{Ohio-geologic-formation-stub