Earth:Potrerillos Formation, Mexico
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| Potrerillos Formation Stratigraphic range: Maastrichtian-Early Paleocene ~70–62 Ma | |
|---|---|
| Type | Formation |
| Unit of | Difunta Group |
| Sub-units | Upper Mudstone member |
| Lithology | |
| Primary | Mudstone |
| Other | Grainstone |
| Location | |
| Coordinates | [ ⚑ ] : 26°00′N 100°48′W / 26.0°N 100.8°W |
| Paleocoordinates | [ ⚑ ] 31°42′N 82°42′W / 31.7°N 82.7°W |
| Region | Coahuila |
| Country |  Mexico |
  Potrerillos Formation, Mexico (Mexico) | |
The Potrerillos Formation is a geologic formation in Mexico. It preserves fossils dating back to the Early Paleocene period.[1]
Description
The Potrerillos Formation was subdivided into five members by McBride (1974), with the second highest, the Upper Mudstone Member. Foraminifera in the lower members indicate a Maastrichtian age, while fossils in the upper members indicate a Paleocene age. Fossil remains are abundant and include transported remains of corals, gastropods, bivalves, shark teeth, and bone fragments.[1]
Fossil content
The following fossils have been reported from the formation:[1]
- Bivalves
- Cephalopods
- Cimomia haltomi[2]
- Elimia cf. trigemmata[2]
See also
- List of fossiliferous stratigraphic units in Mexico
References
- ↑ 1.0 1.1 1.2 Potrerillos Formation at Fossilworks.org
- ↑ 2.0 2.1 2.2 2.3 Vega & Perrilliat, 1995
Bibliography
- Vega, F.J., and M.D.C. Perrilliat. 1995. On some Paleocene invertebrates from the Potrerillos Formation (Difunta Group), northeastern Mexico. Journal of Paleontology 69. 863–869.
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