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El Doctor Formation

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Geologic formation in Mexico
El Doctor Formation
Stratigraphic range: Albian-Cenomanian
~112–95 Ma PreꞒ Ꞓ O S D C P T J K Pg N
TypeFormation
Sub-unitsLa Negra Member
Lithology
PrimaryLime mudstone
Location
Coordinates20°48′N 99°18′W / 20.8°N 99.3°W / 20.8; -99.3
Approximate paleocoordinates18°54′N 64°30′W / 18.9°N 64.5°W / 18.9; -64.5
RegionHidalgo
Country Mexico
El Doctor Formation is located in MexicoEl Doctor FormationEl Doctor Formation (Mexico)Show map of MexicoEl Doctor Formation is located in HidalgoEl Doctor FormationEl Doctor Formation (Hidalgo)Show map of 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. Ammonite fossils show that age of Late Albian is more likely.

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.

Fossil content

The formation has provided the following fossils:

Fish
Arthropods

Ammonites

Echinoderms

See also

References

  1. ^ El Doctor Formation at Fossilworks.org
  2. ^ 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: 103400. Bibcode:2021JSAES.11103400L. doi:10.1016/j.jsames.2021.103400. ISSN 0895-9811.
  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.
  6. González-Rodríguez, K.A.; Espinosa-Arrubarrena, K.; González-Barba, G. (2013). "An overview of the Mexican fossil fish record" (PDF). In Arratia, G.; Schultze, H.-P.; Wilson, M.V.H. (eds.). Mesozoic Fishes 5 – Global Diversity and Evolution. München: Verlag Dr. Friedrich Pfeil. pp. 9–34. ISBN 978-3-89937-159-8.
  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. Bibcode:2016FossR..19..101S. doi:10.5194/fr-19-101-2016. ISSN 2193-0074.
  9. ^ Hegna et al., 2014

Bibliography

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