Gastar Exploration, Inc (Gastar), formerly Gastar Exploration Ltd is an independent energy company engaged in the exploration, development and production of natural gas and oil in the United States. The Company�s principal business activities include the identification, acquisition, and subsequent exploration and development of natural gas and oil properties with an emphasis on unconventional reserves, such as shale resource plays. As of December 31, 2011, it is pursuing the development of liquids-rich natural gas in the Marcellus Shale in the Appalachia area of West Virginia and, to a lesser extent, central and southwestern Pennsylvania. In October 2013, the Company announced the sale of its East Texas properties to Cubic Energy Inc. In November 2013, the Company announced that its subsidiary, Gastar Exploration USA, Inc. acquired Mid-Continent assets from Lime Rock Resources II-A, L.P. and Lime Rock Resources II-C, L.P.