The Brawley Formation is a geologic formation in the Colorado Desert of Southern California, located in northwestern Imperial County and eastern San Diego County.
[1] Sandstone and mudstone of the Brawley Formation accumulated between ~1.1 and ~0.6–0.5 Ma in a delta on the margin of an arid Pleistocene lake.
[1] It is in the San Jacinto Fault Zone area, including in the San Felipe Hills.
It preserves fossils from the Pleistocene Epoch of the Quaternary Period, during the Cenozoic Era.
This article about a specific stratigraphic formation in California is a stub.