Geological Survey Bulletin, Edição 1143U.S. Department of the Interior, Geological Survey; Washington, D.C., 1949 |
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Termos e frases comuns
42 inches inches 42 inches thick 42 Total inches acre-foot Allegheny Formation Allegheny River anticline areas Bakerstown Beaver County Beaver River beds of indicated bituminous coal Brookville Brush Creek coal Butler County coal reserves coal resources Conemaugh Formation Creek coal bed Darlington Township DeWolf estimates feet thick Freeport coal bed Geological Survey high-volatile Homewood coal Homewood Sandstone Member inches inches inches indicated thickness Kittanning coal bed Lawrence County less Lower Freeport coal Lower Kittanning coal Middle Kittanning coal Middle Mercer miles million tons millions of short mining Moist Btu Ohio original reserves outcrops Pennsylvania Geol Pennsylvanian age Pottsville Pottsville Formation quadrangle quadrangle Upper Freeport Quakertown ranges in thickness Reese and Sisler reserves in beds reserves of coal rocks Scrubgrass coal Shenango Rivers short tons siltstone stratigraphic syncline Total inches inches Township U.S. Bur underclay unnamed shale Upper Freeport coal Upper Kittanning coal Upper Mercer Vanport Limestone Member western Pennsylvania Zelienople
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