The lines shown are those used by the USGS in developing the framework geology and models used in assessing the oil and gas resources of the Gulf Coast Region. The data set is comprised of both leased and borrowed company proprietary data. This dataset contains basic data and interpretations developed and compiled by the U.S. Geological Survey's Framework Studies and Assessment of the Gulf Coast Project. Other major sources of data include publicly available information from state agencies as well as publications of the U.S. Geological Survey and other scientific organizations. In cases where company proprietary data were used to produce various derivatives such as contour surfaces, the source is cited but the data are not displayed.