The objectives of this study have been to increase the amount of public information on domestic rift basins and enhance the understanding of petroleum systems operating in these basins. Attainment of these objectives is consistent with the goals of the 1998 Comprehensive National Energy Strategy. The discovery of new hydrocarbon resources in rift basins serves to support national economic and energy security by reducing the vulnerability of the U.S. economy to disruptions in oil supply by boosting domestic production in an environmentally superior manner.