El Cien Formation

The El Cien Formation is a geologic formation in eastern Baja California Sur state, Mexico.^[1]

El Cien Formation
Stratigraphic range: Oligocene-Miocene
Type	Geologic formation
Sub-units	Cerro Colorado Mb. San Hilario Mb. Cerro Tierra Blanca Mb.
Location
Region	Baja California Sur
Country	Mexico

Subunits, from younger/higher to older/lower, include the Cerro Colorado Member, San Hilario Member, and Cerro Tierra Blanca Member.^[1]

Fossil record

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]

See also

• Cenozoic Mexico
• List of fossiliferous stratigraphic units in Mexico