The stratigraphic record of sedimentary rocks within the county spans from the Cambrian Warrior Formation to the Pennsylvanian Conemaugh Group ( in the Broad Top area ).
The stratigraphic record of sedimentary rocks within the county spans from the Devonian Lock Haven Formation ( exposed only in Lick Creek valley ) to the coal-bearing Pennsylvanian Allegheny Formation.
The stratigraphic record of sedimentary rocks within the county spans from the Devonian Scherr Formation to the Pennsylvanian Monongahela Formation.
The stratigraphic record of sedimentary rocks within the county spans from the Cambrian Shadygrove Formation outcropping just south of McConnelsburg to the Pennsylvanian Allegheny Group at the northernmost tip of the county.
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