Cerro Carnerero Formation
The Cerro Carnerero Formation is a geological formation of the Golfo San Jorge Basin in Chubut Province, Patagonia, Argentina.[1]
| Cerro Carnerero Formation Stratigraphic range: Toarcian-Bajocian ~180–170 Ma | |
|---|---|
| Type | Geological formation |
| Unit of | Lonco Trapial Group |
| Underlies | Cañadón Puelman Formation |
| Overlies | Los Tobianos Formation |
| Thickness | 440 m (1,440 ft) |
| Lithology | |
| Primary | Claystone, tuff |
| Other | Conglomerate |
| Location | |
| Coordinates | 44.0°S 69.5°W |
| Approximate paleocoordinates | 41.8°S 28.5°W |
| Region | Chubut Province |
| Country |  Argentina |
| Extent | Golfo San Jorge Basin |
| Type section | |
| Named for | Cerro Carnerero |
| Named by | Herbst |
| Year defined | 1966 |
  Cerro Carnerero Formation (Argentina) | |
Description
The claystones and tuffs of the approximately 440 metres (1,440 ft) thick formation,[2] belonging to the Lonco Trapial Group,[3] were deposited in a fluvial environment.[4]
The formation dates back to the Middle Jurassic (Toarcian stage) and has preserved fossils of Cladophlebis oblonga,[5] and Amygdalodon patagonicus.[6]
The fossiliferous beds rest on Liassic beds with Harpoceras subplanatum, and below the Middle to Upper Jurassic Porphyritic Series. Called the "Cerro Carnerero" beds, Rauhut, 2008, assigned the Cerro Carnerero to the Toarcian to Bajocian.[7]
Lithology
The formation comprises sandy tuffs and bluish gray claystones, which form part of a continental sedimentary series mixed with porphyritic conglomerates with partly encrusted round pebbles, and bluish gray clays with sandy intercalations and clays in lesser amounts.[7]
Fossil content
Vertebrate fauna
| Dinosaurs | ||||
|---|---|---|---|---|
| Taxa | Presence | Notes | Images | |
Genus:
|
Chubut Province | "Partial skeleton"[6][8] | ||
Arthropods
See also
- List of dinosaur-bearing rock formations
- Cañadón Asfalto Formation
- Posidonia Shale
References
- Cañadón Puelman at Fossilworks.org
- Cortés, 1986, p.50
- Cortés, 1986, p.49
- Cortés, 1986, p.53
- Cortés, 1986, p.52
- Weishampel et al., 2004, p.542
- Cañadón Puelman, East Slope, Sierra Pampa de Agnía at Fossilworks.org
- "Table 13.1," in Weishampel et al., 2004, p.263
Bibliography
- Cortés, José María. 1986. Estratigrafía y tectónica de la región central de la Provincia de Chubut, República Argentina (PhD thesis), 1–242. Universidad de Buenos Aires. Accessed 2019-02-16.
- Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2
Further reading
- Cabrera, Á. 1947. Un saurópodo nuevo del Jurásico de Patagonia. Instituto del Museo de la Universidad Nacional de La Plata, Notas del Mueso de La Plata, Paleontología 12. 1–17.