El Cajón Formation
The El Cajón Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
The El Cajón Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
The El Cajón Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
Source: Wikipedia "El Cajón Formation" · CC BY-SA 4.0
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