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| Ysidro Formation | |
|---|---|
| Stratigraphic range: Miocene | |
| Type | Geologic formation |
| Overlies | Bermejo Formation |
| Thickness | 500–1,500 feet (150–460 m) |
| Location | |
| Region | Baja California |
| Country | Mexico |
The Ysidro Formation is a geologic formation in Baja California state, northwestern Mexico.
It preserves fossils dating back to the Miocene epoch of the Neogene period.
 | This article about a specific stratigraphic formation in Mexico is a stub. You can help Wikipedia by expanding it. |
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Parapontoporia is an extinct genus of dolphin that lived off the Pacific coast of North America from the Late Miocene until the genus' extinction during the Pliocene. It is related to the baiji. Fossils have been found in California and Mexico. The Tulare Formation is predominately freshwater, which suggests Parapontoporia may have been tolerant of both salt and fresh water.
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The Ocozocoautla Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
The Taraises Formation is a geologic formation in northern Mexico. It preserves fossils dating back to the Early Cretaceous, including ammonites.
The Cerro de Oro Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
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