Chota Formation
Geologic formation in Peru
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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]
Sub-unitsEsperanza Mb.
Rentema Mb.
Fundo El Triunfo Mb.
Rentema Mb.
Fundo El Triunfo Mb.
UnderliesCajaruro Formation
OverliesCelendín Formation
| Chota Formation | |
|---|---|
| Stratigraphic range: Early Campanian-Late Eocene ~ | |
| 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 | |
| Coordinates | 5°41′41″S 78°30′41″W |
| Approximate paleocoordinates | 7.5°S 60.6°W |
| Region | Cajamarca |
| Country | Peru |
| Extent | Bagua Basin |
| Type section | |
| Named for | Chota |
| Named by | Broggi |
| Location | Esperanza, Cajamarca |
| Year defined | 1942 |
 Chota Formation (Peru) | |
Fossil content
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
Sauropods
| 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". | ||
Crocodylomorphs
| 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] | |
Fish
| Fishes of the Chota Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Pucabatis | P. hoffstetteri | Cajamarca | Maastrichtian | A rhombodontid rajiform | ||