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The El Rayo Formation is a geologic formation in Puerto Rico. It preserves fossils dating back to the Cretaceous period.

See also

• List of fossiliferous stratigraphic units in Puerto Rico

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.

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