El Cien Formation | |
Type: | Geologic formation |
Period: | Miocene |
Age: | Oligocene-Miocene |
Region: | Baja California Sur |
Country: | Mexico |
Subunits: | Cerro Colorado Mb. San Hilario Mb. Cerro Tierra Blanca Mb. |
The El Cien Formation is a geologic formation in eastern Baja California Sur state, Mexico.[1]
Subunits, from younger/higher to older/lower, include the Cerro Colorado Member, San Hilario Member, and Cerro Tierra Blanca Member.[1]
It preserves fossils dating back to the Oligocene epoch of the Paleogene period and Early Miocene epoch of the Neogene period, during the Cenozoic Era.[1] [2]