El Doctor Formation
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El Doctor Formation | |
---|---|
Stratigraphic range: Albian-Cenomanian ~ | |
Type | Formation |
Sub-units | La Negra Member |
Lithology | |
Primary | Lime mudstone |
Location | |
Coordinates | 20°48′N 99°18′W / 20.8°N 99.3°W |
Approximate paleocoordinates | 18°54′N 64°30′W / 18.9°N 64.5°W |
Region | Hidalgo |
Country | Mexico |
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]
Description
[edit]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
[edit]The formation has provided the following fossils:[1][2]
- Fish
- Crustaceans
See also
[edit]References
[edit]- ^ a b c El Doctor Formation at Fossilworks.org
- ^ Feldmann et al., 2007
- ^ Fielitz & González Rodríguez, 2010
- ^ a b Hegna et al., 2014
Bibliography
[edit]- 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: 606–616
- 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: 1343–1351
- 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: 145–156