Annual Report of the United States Geological Survey to the Secretary of the Interior, Volume 22, Part 3

Alaska Allegheny analyses anthracite coal anticline Appalachian Arkansas Atwell sand average basin bench bituminous coal Blossburg Cambria Cambria County Carboniferous cent chalk chalk-marl Clarion clay Clearfield County coal beds Coal Company coal field Coal Measures coal-bearing rocks coke conglomerate contains County Creek Cretaceous deposits district east eastern extends feet 6 inches feet in thickness feet thick fixed carbon formation Freeport fuel GEOLOGICAL SURVEY horizon Indiana Kittanning Lake Lehigh lignite limestone locally located Lower Kittanning marl Mercer Michigan miles Mountain northern occur operators outcrop Pennsylvania Pittsburg portion Portland cement Pottsville production Railroad region reported Rept River Saginaw sandstone Saratoga seam shaft shale shaly Short tons shows slope southern southwestern square miles steam strata sulphur surface syncline thin tion U. S. Geol Upper Valley vicinity volatile Watrous western Whitecliffs workable coal workable thickness Wyoming Yukon