Type Geologic formation Primary Marine sediments | ||
Region | ||
The La Joya Formation is a Jurassic period geologic formation in Northeast Mexico. It is located in the Sierra Madre Oriental range, in southwestern Tamaulipas state.
It preserves fossils dating back to the Jurassic period. Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 8 July 2014. . Donaldina robusta (Streptacididae family of the Heterobranchia clade) fossils from the Sierra Agua Verde range date from the Pennsylvanian subperiod of the Carboniferous period.
References
La Joya Formation Wikipedia(Text) CC BY-SA