The Palm Spring Formation is an extensively-exposed delta-plain deposit debouched by the ancestral Colorado River across the subsiding Salton Trough.
[1] It records the development of the prehistoric Colorado River delta cone into a barrier excluding marine waters from the Salton Trough.
[2] It preserves fossils from the Pleistocene Epoch, during the Quaternary Period of the Cenozoic Era.
[3] Lower Pliocene sub−period petrified wood is found in Anza-Borrego Desert State Park.
This article about a specific stratigraphic formation in California is a stub.