Where’s the gas coming from? aspwv2013-04-25T00:00:00-04:00April 25th, 2013|Environment, FAQ Home, Frequently Ask Questions| The natural gas in the Marcellus Shale formation comes from the compression of organic matter over hundreds of millions of years. The Marcellus formation is upwards of 390 million years and located 4,000-9,000 feet below the earth’s surface. Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail