El Cien Formation | |
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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 |
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]