USGS2; Stratigraphic Contacts and Named/Unnamed Units					
Formation/Group	Stratigraphic unit	Top (ft)	Depth (ft)	Thick (ft)	Elevation (ft)
Conemaugh Group		0.00	108.60	108.60	3040.93
Allegheny Formation		108.60	290.60	182.00	2932.33
	Upper Freeport Rider	108.60	109.20	0.60	2932.33
	Upper Freeport coal bed	115.40	119.89	4.49	2925.53
	Lower Freeport coal bed	167.68	171.15	3.47	2873.25
	Upper Kittanning coal bed	203.40	204.70	1.30	2837.53
	Middle Kittanning coal bed	227.00	227.80	0.80	2813.93
	Lower Kittanning coal bed	248.00	260.00	12.00	2792.93
	Clarion coal bed	280.90	283.10	2.20	2760.03
Pottsville Group		290.60	315.00	24.40	2750.33