Chota Formation

Chota Formation
Chota Formation
Stratigraphic range: Early Campanian-Late Eocene; ~83–35 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Sub-units	Esperanza Mb.; Rentema Mb.; Fundo El Triunfo Mb.
Underlies	Cajaruro Formation
Overlies	Celendín Formation
Thickness	320 m (1,050 ft)
Lithology
Primary	Shale, sandstone
Other	Gypsum
Location
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Approximate paleocoordinates	Lua error: callParserFunction: function "#coordinates" was not found.
Region	Cajamarca
Country	Peru
Extent	Bagua Basin
Type section
Named for	Chota
Named by	Broggi
Location	Esperanza, Cajamarca
Year defined	1942
	Chota Formation is located in Peru Chota Formation (Peru)

The Chota Formation is an Early Campanian to Late Eocene geologic formation of the Cajamarca and western Amazonas Region in northern Peru. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus ("Baguasaurus").^[1] The formation was formerly named Bagua Formation.^[2]

Fossil content

Color key

Taxon	Reclassified taxon	Taxon falsely reported as present	Dubious taxon or junior synonym	Ichnotaxon	Ootaxon	Morphotaxon

Notes
Uncertain or tentative taxa are in small text; ~~crossed out~~ taxa are discredited.

Sauropods of the Chota Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Lithostrotia indet.	Indeterminate	Cajamarca	Campanian to Maastrichtian		A Lithostrotian titanosaur; informally known as "Baguasaurus".

Crocodylomorph of the Chota Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Crocodylomorpha indet.^[3]	Indeterminate	Cajamarca	Campanian to Maastrichtian	Teeth	Possibly a Notosuchia; previously known as Spinosauridae.^[4]

Fishes of the Chota Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Pucabatis	P. hoffstetteri	Cajamarca	Maastrichtian		A rhombodontid rajiform

^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
^ Chacaltana et al., 2014
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T. Mourier, P. Bengtson, M. Bonhomme, E. Buge, H. Cappetta, J.-Y. Crochet, M. Feist, K. F. Hirsch, E. Jaillard, G. Laubacher, J. P. Lefranc, M. Moullade, C. Noblet, D. Pons, J. Rey, B. Sigé, Y. Tambareau and P. Taquet. 1988. The Upper Cretaceous–Lower Tertiary marine to continental transition in the Bagua Basin, northern Peru: paleontology, biostratigraphy, radiometry, correlations. Newsletters on Stratigraphy 19(3):143-177