Yuma Desert
Rogers (1966) extended the San Dieguito label to a wide region of western North America, recognizing four major regions: a Central Aspect, in southeastern California, western Nevada, and northeastern Baja California; a Southwestern Aspect, in southwestern California and most of Baja California; a Southeastern Aspect, in the Yuma Desert of southern Arizona and Sonoran Desert of northern Sonora; and a Western Aspect, in north eastern California's upper Great Basin. In the latter, early Holocene remains are more generally assigned to the Borax Lake Complex and Post Pattern. In the Mojave Desert and the lower Great Basin, such remains are now most frequently termed the Lake Mohave Complex. The San Dieguito Complex nomenclature is still in active use in southwestern California, the Colorado Desert, northern Baja California, and northern Sonora Mexico.