whole thing is the marcellus shale, the largest natural gas deposit in north america.th there s a penn stat study that says 489 trillion cubic feet are natural gas are in this region, more than 20 times what we use in the united states every year. the remains form the catskill mountains in new york and extends from tennessee, west virginia, across pennsylvania, ohio. let s do this. let s go to the video from the marcellus shale coalition. the gas deposit could be worth $2 trillion i today s prices. shale gas production already accounts for about one-fifth of the country s gas production, and the current rate is expected to provide half of the nation s gas by 2030. this was in june we got this report from our affiliate ofwja