Earth:Toqui Formation
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Short description: Geologic formation in the Aysén Region, Chile
| Toqui Formation Stratigraphic range: Tithonian ~147 Ma | |
|---|---|
 Cast of Chilesaurus from the Toqui Formation | |
| Type | Geological formation |
| Unit of | Coihaique Group |
| Underlies | Katterfeld Formation |
| Overlies | Ibáñez Formation |
| Thickness | 300–320 m (980–1,050 ft) |
| Lithology | |
| Primary | Conglomerate, sandstone, tuffite, ignimbrite |
| Location | |
| Coordinates | [ ⚑ ] : 46°36′S 72°24′W / 46.6°S 72.4°W |
| Paleocoordinates | [ ⚑ ] 44°48′S 32°24′W / 44.8°S 32.4°W |
| Region | Aysén Region |
| Country |  Chile |
  Toqui Formation (Chile) | |
The Toqui Formation is a geological formation in the Aysén Region of southern Chile . It has been dated to the Tithonian stage of the Late Jurassic by uranium–lead dating of zircons, providing an age of 147 ± 0.1 Ma.[1] It consists of an sequence of clastic sedimentary sandstones and conglomerates, interbedded with volcanic tuffs and ignimbrite.[2] The dinosaurs Chilesaurus and indeterminate diplodocids and the mesoeucrocodylian Burkesuchus are known from the formation.[3][4][5] The formation was deposited in a fluvio-deltaic environment.[6]
Paleobiota of the Toqui Formation
Crocodylomorphs
| Genus | Species | Material | Notes | Images |
|---|---|---|---|---|
| Burkesuchus | B. mallingrandensis | "Fragmented skull and partial postcrania."[5] | A neosuchian. | 
|
| Crocodylomorpha indet. | Indeterminate | "Partial postcrania."[7] | A neosuchian. |
Dinosaurs
| Genus | Species | Material | Notes | Images |
|---|---|---|---|---|
| Chilesaurus | C. diegosuarezi | "Skull with and skeletons from multiple specimens."[3][8] | A dinosaur with uncertain affinities. | 
|
| Diplodocidae indet. | Indeterminate | "Cervical centra."[4] | A diplodocid. | |
| Diplodocinae indet. | Indeterminate | "Partial caudal vertebra."[4] | A diplodocin. | |
|
Sauropoda indet. |
Indeterminate | "Partial dorsal vertebra."[4] | A sauropod. | |
| Indeterminate | "Two caudal vertebrae centra."[4] | A sauropod. | ||
| Indeterminate | "Partial sternal plate."[4] | A sauropod. | ||
|
Titanosauriformes? indet. |
Indeterminate | "Lower end of left femur."[4] | A titanosauriform. | |
| Indeterminate | "Lower end of right tibia."[4] | A titanosauriform. |
See also
- Geology of Chile
- Tobífera Formation
References
- ↑ Suárez, Manuel; De La Cruz, Rita; Fanning, Mark; Novas, Fernando; Salgado, Leonardo (2015-12-28). "Tithonian age of dinosaur fossils in central Patagonian, Chile: U–Pb SHRIMP geochronology" (in en). International Journal of Earth Sciences 105 (8): 2273–2284. doi:10.1007/s00531-015-1287-7. ISSN 1437-3254.
- ↑ Salgado, Leonardo; Cruz, Rita Dela; Suárez, Manuel; Fernández, Marta; Gasparini, Zulma; Palma-Heldt, Sylvia; Fanning, Mark (2008-06-12). "First Late Jurassic dinosaur bones from Chile" (in en). Journal of Vertebrate Paleontology 28 (2): 529–534. doi:10.1671/0272-4634(2008)28[529:fljdbf2.0.co;2]. ISSN 0272-4634.
- ↑ 3.0 3.1 Novas, Fernando E.; Salgado, Leonardo; Suárez, Manuel; Agnolín, Federico L.; Ezcurra, Martín D.; Chimento, Nicolás R.; de la Cruz, Rita; Isasi, Marcelo P. et al. (2015). "An enigmatic plant-eating theropod from the Late Jurassic period of Chile" (in En). Nature 522 (7556): 331–334. doi:10.1038/nature14307. ISSN 0028-0836. PMID 25915021.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Salgado, Leonardo; Novas, Fernando E.; Suarez, Manuel; Cruz, Rita De La; Isasi, Marcelo; Rubilar-Rogers, David; Vargas, Alexander (2015). "Late Jurassic Sauropods in Chilean Patagonia" (in en-US). Ameghiniana 52 (4): 418–429. doi:10.5710/amgh.07.05.2015.2883. ISSN 0002-7014.
- ↑ 5.0 5.1 "New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles". Scientific Reports 11 (1): Article number 14960. 2021. doi:10.1038/s41598-021-93994-z. PMID 34294766.
- ↑ Toqui Formation, Aysén at Fossilworks.org
- ↑ Lio, G.; Novas, F.; Salgado, L.; Suárez, M.; De La Cruz, R. (2010). "First record of a non-marine crocodylomorph (Archosauria) from the Upper Jurassic of Chile". Ameghiniana 48 (4). https://www.researchgate.net/publication/280386851.
- ↑ Chimento, N. R.; Agnolin, F. L.; Novas, F. E.; Ezcurra, M. D.; Salgado, L.; Isasi, M. P.; Suarez, M.; De La Cruz, R. et al. (2017). "Forelimb posture in Chilesaurus diegosuarezi (Dinosauria, Theropoda) and its behavioral and phylogenetic implications". Ameghiniana 54 (5): 567−575. doi:10.5710/AMGH.11.06.2017.3088. https://repositorio.uchile.cl/bitstream/handle/2250/148932/Forelimb-posture.pdf?sequence=1&isAllowed=y.
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