# Otay Formation

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The **Otay Formation** is a [geologic formation](/source/Formation_(geology)) in [San Diego County, California](/source/San_Diego_County,_California) (United States) and northern [Baja California](/source/Baja_California) state (Mexico).[1][2] It is within the [Peninsular Ranges](/source/Peninsular_Ranges) province.[1]

## Fossils

It preserves [fossils](/source/Fossils) of the [Oligocene](/source/Oligocene) to [Miocene](/source/Miocene) periods of the [Cenozoic Era](/source/Cenozoic_Era).[1] Fossils in the [Sweetwater Formation](/source/Sweetwater_Formation) that underlies the Otay Formation are of the [Late Eocene](/source/Eocene) period.[1]

## See also

- [List of fossiliferous stratigraphic units in California](/source/List_of_fossiliferous_stratigraphic_units_in_California)
- [Paleontology in California](/source/Paleontology_in_California)
- [List of fossiliferous stratigraphic units in Mexico](/source/List_of_fossiliferous_stratigraphic_units_in_Mexico)

## References

1. [AAPG Datapages/Archives: Age and Stratigraphy of the Sweetwater and Otay Formations, San Diego County, California](http://archives.datapages.com/data/pac_sepm/086/086001/pdfs/131.htm)

1. [Geiconsultants.com: Geologic Formations of Western San Diego County](http://www.geiconsultants.com/stuff/contentmgr/files/0/3aaf5188d802ff649166ba80c318e433/download/geologic_formations_of_western_san_diego.pdf)[dead link]; pg 5.

## Further reading

- ["General Plan Final Program EIR: 3.11 Paleontological Resources"](http://www.sandiego.gov/planning/genplan/pdf/peir/paleontological.pdf). *City of San Diego*

## External links

- ((Various Contributors to the Paleobiology Database)). ["Fossilworks: Gateway to the Paleobiology Database"](https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home). Archived from [the original](https://www.fossilworks.org/) on 25 March 2022. Retrieved 17 December 2021.

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Adapted from the Wikipedia article [Otay Formation](https://en.wikipedia.org/wiki/Otay_Formation) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Otay_Formation?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.