Abstract • Introduction • Chronostratigraphic Nomenclature • Paleogeographic Setting • Stratigraphic Framework • Previous Studies of Fusulinids in Southeastern California • Fusulinid Sample Material • Fusulinid Faunas and Zones • Correlations • Comparison of Bird Spring Shelf and Keeler Basin Fusulinid Faunas • Comparison of Bird Spring Shelf and Darwin Basin Fusulinid Faunas • Interpretations and Discussion • General Paleoenvironmental Significance of Fusulinids • Fusulinid Distribution and Sedimentation Patterns on the Bird Spring Shelf • Possible Effects of Eustatic Sea-Level Fluctuations • Regional Paleogeographic Evolution • Tectonic Interpretations and Timing of the Last Chance Thrust • Tectonic Correlations • Summary • Systematic Paleontology • Fusulinid Plates • Acknowledgments • Appendix 1. List of Fusulinid Samples with General Locations • Appendix 2. Descriptions of Outcrop Areas and Fusulinid Localities, Ship Mountains, Providence Mountains, Old Dad Mountain, Cowhole Mountain, Warm Spring Canyon, Striped Butte, Panamint Butte • Appendix 3. Locality Information for Figured Specimens • References Cited