The Otay Formation is a geologic formation in San Diego County, California (United States) and northern Baja California state (Mexico).AAPG Datapages/Archives: Age and Stratigraphy of the Sweetwater and Otay Formations, San Diego County, California Geiconsultants.com: Geologic Formations of Western San Diego County; pg 5. It is within the Peninsular Ranges province.
Fossils It preserves fossils of the Oligocene to Miocene periods of the Cenozoic Era. Fossils in the Sweetwater Formation that underlies the Otay Formation are of the Late Eocene period.
See also
List of fossiliferous stratigraphic units in California Paleontology in California List of fossiliferous stratigraphic units in Mexico
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Further reading
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