Earth:El Doctor Formation

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El Doctor Formation
Stratigraphic range: Albian-Cenomanian
~112–95 Ma
TypeFormation
Sub-unitsLa Negra Member
Lithology
PrimaryLime mudstone
Location
Coordinates [ ⚑ ] : 20°48′N 99°18′W / 20.8°N 99.3°W / 20.8; -99.3
Paleocoordinates [ ⚑ ] 18°54′N 64°30′W / 18.9°N 64.5°W / 18.9; -64.5
RegionHidalgo
CountryMexico
El Doctor Formation is located in Mexico
El Doctor Formation
El Doctor Formation (Mexico)
El Doctor Formation is located in Hidalgo
El Doctor Formation
El Doctor Formation (Hidalgo)

The El Doctor Formation is a geologic formation in Mexico. It preserves fossils dating back to the Albian and Cenomanian stages of the Cretaceous period.[1] Ammonite fossils show that age of Late Albian is more likely.[2]

Description

The light grey micritic limestone sequence with intercalated black chert lenses was deposited in an open marine basin with a hypersaline and/or poorly oxygenated bottom.[1]

Fossil content

The formation has provided the following fossils:[1][3][4][5][2]

Fish
Arthropods

Ammonites

Echinoderms

See also

  • List of fossiliferous stratigraphic units in Mexico
    • Sierra Madre Formation

References

  1. ↑ 1.0 1.1 1.2 El Doctor Formation at Fossilworks.org
  2. ↑ 2.0 2.1 López-Palomino, Isabel; González-Rodríguez, Katia Adriana; Schultze, Hans-Peter; Palma-Ramírez, Arturo; Contreras-Cruz, Diana (2021-11-01). "Ammonites from the La Negra Facies (El Doctor Formation, late Albian) of the Muhi Quarry, Hidalgo, central Mexico". Journal of South American Earth Sciences 111. doi:10.1016/j.jsames.2021.103400. ISSN 0895-9811. Bibcode: 2021JSAES.11103400L. https://www.sciencedirect.com/science/article/pii/S0895981121002479. 
  3. ↑ Feldmann et al., 2007
  4. ↑ Arratia, Gloria; González-Rodrígue, Katia (17 July 2024). "A New Intriguing Teleost from the Albian Muhi Quarry, Central Mexico, and Early Euteleostean Diversification". Diversity 16 (7): 414. doi:10.3390/d16070414. 
  5. ↑ Rodríguez, Katia González; Fielitz, Christopher (2016). "CRETACEOUS OSTEICHTHYAN FISH ASSEMBLAGES FROM MEXICO". Cretaceous Period: Biotic Diversity and Biogeography. New Mexico Museum of Natural History and Science Bulletin 71. https://www.academia.edu/26614900. 
  6. ↑ González-Rodríguez, K.A.; Espinosa-Arrubarrena, K.; González-Barba, G. (2013). "An overview of the Mexican fossil fish record". Mesozoic Fishes 5 – Global Diversity and Evolution. München: Verlag Dr. Friedrich Pfeil. pp. 9–34. ISBN 978-3-89937-159-8. http://www.pfeil-verlag.de/wp-content/uploads/2015/05/4_59d01.pdf. 
  7. ↑ Fielitz & González Rodríguez, 2010
  8. ↑ Schultze, Hans-Peter; González-Rodríguez, Katia Adriana (2016-04-15). "Actinistian gular plates from the Cretaceous of Mexico and the problems assigning gular plates taxonomically". Fossil Record 19 (2): 101–117. doi:10.5194/fr-19-101-2016. ISSN 2193-0074. Bibcode: 2016FossR..19..101S. 
  9. ↑ 9.0 9.1 Hegna et al., 2014

Bibliography

  • Hegna, T. A.; Vega, F. J.; González Rodríguez, K. A. (2014), "First Mesozoic thylacocephalans (Arthropoda, Crustacea; Cretaceous) in the western hemisphere: new discoveries from the Muhi Quarry Lagerstätte", Journal of Paleontology 88 (3): 606–616, doi:10.1666/13-131, Bibcode: 2014JPal...88..606H 
  • Fielitz, C.; González Rodríguez, K. A. (2010), "A New Species of Enchodus (Aulopiformes: Enchodontidae) from the Cretaceous (Albian to Cenomanian) of Zimapán, Hidalgo, México", Journal of Vertebrate Paleontology 30 (5): 1343–1351, doi:10.1080/02724634.2010.501438, Bibcode: 2010JVPal..30.1343F 
  • Feldmann, R. M.; Vega, F. J.; Martínez López, L.; González Rodrigues, K. A.; González León, O.; Rosario Fernández-Barajas, M. (2007), "Crustacea from the Muhi Quarry (Albian-Cenomanian), and a review of Aptian Mecochiridae (Astacidea) From Mexico", Annals of Carnegie Museum 76 (3): 145–156, doi:10.2992/0097-4463(2007)76[145:CFTMQA2.0.CO;2] 



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