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 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
CountryFlag of Mexico.svg  Mexico
Mexico relief location map.jpg
Green pog.svg
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]

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] [2]

Fish
Crustaceans

See also

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References

  1. 1 2 3 El Doctor Formation at Fossilworks.org
  2. Feldmann et al., 2007
  3. Fielitz & González Rodríguez, 2010
  4. 1 2 Hegna et al., 2014

Bibliography