New Shale Layer Above the Marcellus Yields Positive Results Butler County | CONSOL Energy | Energy Companies | Greene County (PA) | Pennsylvania | Statewide PA | Upper Devonian Shale | Washington County July 16, 2013July 16, 2013 What’s this? A new, third layer of shale a few hundred feet above the Marcellus is producing good quantities of shale gas? Yep. And CONSOL Energy reports they’ve successfully tapped it… Please Login to view this content. (Not a member? Join Today!) Related