Montage Resources Corp, formerly Eclipse Resources Corp, is an independent exploration and production company. The Company is engaged in the acquisition and development of oil and natural gas properties in the Appalachian Basin. It is the operator of the Utica Core Area and its Marcellus Project Area. The Ordovician-aged Utica Shale is an unconventional reservoir consisting of organic-rich black shale, with production occurring at vertical depths between 6,000 and 10,000 feet. The Marcellus Shale consists of organic-rich black shale, with production occurring at vertical depths between 5,000 and 8,000 feet. As of December 31, 2016, it had approximately 92,000 net acres in the Utica Shale in Eastern Ohio within the Utica Core Area. As of December 31, 2016, the Company had assembled an acreage position approximating 199,000 net acres in Eastern Ohio.