Figure 1: (a) Location map for the Fort Worth Basin showing the distribution of the Barnett Shale (shaded area) and structural and tectonic features; dots refer to the studied wells; 1: John Porter #3, 2: Sol Carpenter #7, 3: Adams SW #7, 4: Sugar Tree #3, and 5: Spencer Trussell 1-H (modified from [10]). (b) The schematic section shows an interpretation of the Mississippian stratigraphy (modified from [10]).