Potrerillos Formation, Mexico
Potrerillos Formation | |
---|---|
Stratigraphic range: Maastrichtian-Early Paleocene ~70–62 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
Type | Formation |
Unit of | Difunta Group |
Sub-units | Upper Mudstone member |
Lithology | |
Primary | Mudstone |
Other | Grainstone |
Location | |
Coordinates | 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
References
- ^ a b c Potrerillos Formation at Fossilworks.org
- ^ a b c d Vega & Perrilliat, 1995
Bibliography
- Vega, F.J.; Perrilliat, M.D.C. (1995), "On some Paleocene invertebrates from the Potrerillos Formation (Difunta Group), northeastern Mexico", Journal of Paleontology, 69 (5): 863–869, Bibcode:1995JPal...69..862V, doi:10.1017/S0022336000035538