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| Barranca Group | |
|---|---|
| Stratigraphic range: Triassic | |
| Type | Group |
| Location | |
| Country | Mexico |
The Barranca Group is a geologic group in Mexico. It preserves fossils dating back to the Triassic period.
 | This article about a specific stratigraphic formation in Mexico is a stub. You can help Wikipedia by expanding it. |
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The Conemaugh Group is a geologic group in West Virginia, Pennsylvania, Ohio, and Maryland. It preserves fossils dating back to the Carboniferous period.
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The Black River Group is a geologic group in Illinois and West Virginia. It preserves fossils dating back to the Ordovician period.
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The Mural Limestone is a geologic formation of the Bisbee Group in Arizona and Mexico. It preserves fossils dating back to the Cretaceous period.
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