Figure 2. Cross section of shelf-to-basin transect in Texas showing Smackover/Haynesville/Bossier sequences. This west-east section extends from the Haynesville platform carbonates in Freestone County, across the East Texas Salt Basin (ETSB), onto the Sabine Uplift, showing fluctuations in thickness related to preexisting paleogeography. HST, highstand systems tract; and TST, transgressive systems tract.