El Doctor Formation

Last updated
El Doctor Formation
Stratigraphic range: Albian-Cenomanian
~112–95  Ma
Type Formation
Sub-unitsLa Negra Member
Lithology
PrimaryLime mudstone
Location
Coordinates 20°48′N99°18′W / 20.8°N 99.3°W / 20.8; -99.3
Approximate paleocoordinates 18°54′N64°30′W / 18.9°N 64.5°W / 18.9; -64.5
Region Hidalgo
Country Mexico
Mexico topographic map-blank 2.svg
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El Doctor Formation (Mexico)
Mexico Hidalgo location map.svg
Green pog.svg
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]

Contents

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. 1 2 3 El Doctor Formation at Fossilworks.org
  2. 1 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. 1 2 Hegna et al., 2014

Bibliography

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