books.google.com - Running from southern West Virginia through eastern Ohio, across central and northeast Pennsylvania, and into New York through the Southern Tier and the Catskills, the Marcellus Shale formation underlies a sparsely populated region that features striking landscapes, critical watersheds, and a struggling...http://books.google.com/books/about/Under_the_Surface.html?id=Xk_fpsoCLlQC&utm_source=gb-gplus-shareUnder the Surface
