Potrerillos Formation, Mexico

Last updated
Potrerillos Formation
Stratigraphic range: Maastrichtian-Early Paleocene
~70–62  Ma
Type Formation
Unit of Difunta Group
Sub-unitsUpper Mudstone member
Lithology
Primary Mudstone
Other Grainstone
Location
Coordinates 26°00′N100°48′W / 26.0°N 100.8°W / 26.0; -100.8
Approximate paleocoordinates 31°42′N82°42′W / 31.7°N 82.7°W / 31.7; -82.7
Region Coahuila
Country Mexico
Mexico topographic map-blank 2.svg
Green-orange pog.svg
Potrerillos Formation, Mexico (Mexico)

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

Contents

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

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