El Doctor Formation

El Doctor Formation
Stratigraphic range: Albian-Cenomanian
~
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
CountryMexico
El Doctor Formation (Mexico)
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

References

  1. ^ a b c El Doctor Formation at Fossilworks.org
  2. ^ a b 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. ^ a b Hegna et al., 2014

Bibliography

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