Map of north-central Gulf Coast Basin from Schenk and Viger (1996) showing outlines of three Cotton Valley Group plays identified by U.S. Geological Survey in the 1995 National Assessment of the United States oil and gas resources. Shown are the Cotton Valley Blanket Sandstones gas play (4923) identified as a continuous gas play, and the Cotton Valley Salt Basins gas play (4922) and Cotton Valley Sabine Uplift gas play (4924) identified as conventional gas plays.

Source: USGS: Geologixal Studies of Basin-Centered Gas Systems
U.S. Geological Survey Bulletin 2184-D