Potrerillos Formation, Mexico

The Potrerillos Formation is a geologic formation in Mexico. It preserves fossils dating back to the Early Paleocene period.[1]

Potrerillos Formation
Stratigraphic range: Maastrichtian-Early Paleocene
~70–62 Ma
TypeFormation
Unit ofDifunta Group
Sub-unitsUpper Mudstone member
Lithology
PrimaryMudstone
OtherGrainstone
Location
Coordinates26.0°N 100.8°W / 26.0; -100.8
Approximate paleocoordinates31.7°N 82.7°W / 31.7; -82.7
RegionCoahuila
Country Mexico
Potrerillos Formation, Mexico (Mexico)

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]

See also

References

  1. Potrerillos Formation at Fossilworks.org
  2. 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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