USGS1; Stratigraphic Contacts and Named/Unnamed Units						
Formation/Group	Stratigraphic unit	Top (ft)	Depth (ft)	Thick (ft)	Elevation (ft)	
Conemaugh Group		0.00	300.10	300.10	3390.00	
	Bakerstown coal bed	175.19	176.70	1.51	3214.81	
Allegheny Formation		300.10	483.55	183.45	3089.90	
	Upper Freeport coal bed 	300.10	309.10	9.00	3089.90	
	Upper Freeport Limestone	311.55	314.25	2.70	3078.45	
	Upper Kittanning coal bed 	382.60	386.81	4.21	3007.40	
	Unnamed coal bed	407.70	408.44	0.74	2982.30	
	Middle Kittanning coal bed 	428.88	430.50	1.62	2961.12	
	Lower Kittanning coal bed 	460.55	465.24	4.69	2929.45	
Pottsville Group		483.55	679.00	195.45	2906.45	
	Unnamed coal bed	550.80	551.32	0.52	2839.20	
	Unnamed coal bed	652.74	653.10	0.36	2737.26	
	Unnamed coal bed	675.48	675.83	0.35	2714.52