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Geologic framework Continued
9 other sections not shown
7.5-minute quadrangle Figure Allegheny Formation Anthracite region anticlinal Appalachian coal basin Appendix Armstrong ARMSTRONG COUNTY Bakerstown BASE OF COAL bituminous coal boreholes British thermal unit Brookville Bureau of Mines Cambria County carbon Clarion COAL BED feet coal owner coal rank coal seams coal-bed methane coalbed Conemaugh Group cubic degasification DEPTH TO BASE desorption Diamond drill holes Edmunds Fayette County feet thick fracture gas contents ranged Greene County heating values High-volatile HV-A Llewellyn Formation Lower Freeport Lower Kittanning Mcfd Medium-volatile Middle Kittanning mile Monongahela Group natural gas natural open flow Northern Appalachian coal oil and gas Pennsylvania Geological Survey percent permeability Pittsburgh rider plugged Pottsville Formation quadrangle Figure 13 residual gas resource sandstone Sewickley shale Skema Somerset Counties strata structure contours synclinal synclinal axis target tested THICKNESS OF COAL tion total gas content U.S. Bureau Uniontown unnamed pool Upper Kittanning USBM Washington County Westmoreland County