The Ysidro Formation is a geologic formation in Baja California state, northwestern Mexico.

Ysidro Formation
Stratigraphic range: Miocene
TypeGeologic formation
OverliesBermejo Formation
Thickness500–1,500 feet (150–460 m)
Location
RegionBaja California
CountryMexico

It preserves fossils dating back to the Miocene epoch of the Neogene period.

See also

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  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.