Sierra Madre Formation

Sierra Madre Formation
Stratigraphic range: Aptian-Santonian
Type Geologic formation
Overlies Santiago Formation
Lithology
Primary Marine limestones
Other Dolomite
Location
Region Chiapas
Country Southwestern Mexico
Type section
Named for Sierra Madre de Chiapas

The Sierra Madre Formation is a geologic formation in Chiapas state, southern Mexico. It consists of marine dolomites and limestones.

Fossil record

The formation preserves fossils dating back to the Cretaceous period. [1] Pepemkay, a Late Cretaceous prehistoric ray-finned fish, were found in the formation. Other prehistoric fish fossils, found in quarries near the Municipality of Ocozocoautla de Espinosa, include Macrosemiids (Macrosemiocotzus species), Clupeomorphs (Triplomystus applegatei and Paraclupea-like species), and Alepisauriformes (Saurorhamphus and Enchodus species) [2] [3]

See also

References

  1. ↑ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
  2. ↑ "The fossil fishes from the Sierra Madre Formation, Ocozocoautla, Chiapas, Southern Mexico"; Palaeontologia Electronica 12(2.4A) · January 2009, by Jesus Alvarado-Ortega.
  3. ↑ "A Cenomanian aipiochthyoid fish (Teleostei, Acantomorpha) from America, Zoqueichthys carolinae gen. and sp. nov. from El Chango quarry (Cintalapa Member, Sierra Madre Formation), Chiapas, Mexico"; by Adriana López-Arbarello & Jesús Alvarado Ortega.
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