Potrerillos Formation
Stratigraphic range: Maastrichtian-Early Paleocene
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TypeFormation
Unit ofDifunta Group
Sub-unitsUpper Mudstone member
Lithology
PrimaryMudstone
OtherGrainstone
Location
Coordinates26°00′N 100°48′W / 26.0°N 100.8°W / 26.0; -100.8
Approximate paleocoordinates31°42′N 82°42′W / 31.7°N 82.7°W / 31.7; -82.7
RegionCoahuila
Country Mexico
Potrerillos Formation, Mexico is located in Mexico
Potrerillos Formation, 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]

See also

References

  1. 1 2 3 Potrerillos Formation at Fossilworks.org
  2. 1 2 3 4 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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