Related by context. Frequent words. (Click for all words.) 77 Marcellus Shale 76 Marcellus shale 61 shale formations 59 shale 58 fracking 58 Marcellus 57 shale deposits 57 hydraulic fracturing 57 Barnett Shale 56 Appalachian Basin 55 shale gas 54 Roan Plateau 53 Fracking 53 drillers 53 coal seams 52 Fayetteville Shale 52 coalbed methane 52 Haynesville Shale 50 horizontal drilling 50 coal seam 47 Piceance Basin 46 natural gas 46 Chesapeake Energy 46 bed methane 45 outer continental shelf 45 shales 45 Powder River Basin 45 North Slope 44 Outer Continental Shelf 44 coal seam gas 44 drilling 44 CNX Gas 44 Shale 43 Haynesville 43 Williston Basin 43 aquifers 42 horizontal wells 42 Montney 42 exploratory drilling 41 hydrocarbon 41 Ford Shale 41 Kashagan 41 Appalachia 41 Gas Drilling 41 oil sands 41 Sublette County 40 mineral extraction 40 Range Resources 40 Pennsylvania 40 mountaintop mining 39 gas condensate 39 Krishna Godavari basin 39 DCNR 39 Chukchi Sea 39 trillion cubic feet 39 EOG Resources Inc. 39 hydrocarbon reserves 39 XTO 39 methane 39 oilsands 39 wells drilled 39 Niobrara 39 Tom Corbett 39 rock formations 39 Beaufort Sea 38 Susquehanna River 38 Alberta oilsands 38 Ultra Petroleum 38 Luzerne County 38 Gov. Ed Rendell 38 Pennsylvanians 38 wells 38 northeastern Pennsylvania 38 Rendell 38 NYRI 38 Environmental Conservation 38 Southern Tier 38 tar sands 38 farmland preservation 38 PennFuture 38 Cabot Oil 38 Pennsylvania Turnpike 37 Barents Sea 37 underground aquifers 37 hydrocarbons 37 seabed 37 DEP 37 mineral 37 McMoRan 37 Luzerne 37 Encana 37 coal mining 36 earth crust 36 wellhead 36 exploration 36 ANWR 36 Northeastern Pennsylvania 36 directional drilling 36 XTO Energy Inc. 36 mountaintop removal 36 Petrohawk