Potrerillos Formation, Mexico
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| Potrerillos Formation | |
|---|---|
| Stratigraphic range: Maastrichtian-Early Paleocene ~ | |
| 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 |
| Approximate 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]
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]