Cerro Carnerero Formation

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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
Thickness440 m (1,440 ft)
Lithology
Primary Claystone, tuff
Other Conglomerate
Location
Coordinates 44°00′S69°30′W / 44.0°S 69.5°W / -44.0; -69.5
Approximate paleocoordinates 41°48′S28°30′W / 41.8°S 28.5°W / -41.8; -28.5
Region Chubut Province
CountryArgentina
Extent Golfo San Jorge Basin
Type section
Named forCerro Carnerero
Named byHerbst
Year defined1966
Relief Map of Argentina.jpg
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Cerro Carnerero Formation (Argentina)

The Cerro Carnerero Formation is a geological formation of the Golfo San Jorge Basin in Chubut Province, Patagonia, Argentina. [1]

Contents

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
TaxaPresenceNotesImages
Genus:
  1. A. patagonicus
Chubut Province "Partial skeleton" [6] [8]

Arthropods

See also

References

  1. Cañadón Puelman at Fossilworks.org
  2. Cortés, 1986, p.50
  3. Cortés, 1986, p.49
  4. Cortés, 1986, p.53
  5. Cortés, 1986, p.52
  6. 1 2 Weishampel et al., 2004, p.542
  7. 1 2 3 Cañadón Puelman, East Slope, Sierra Pampa de Agnía at Fossilworks.org
  8. "Table 13.1," in Weishampel et al., 2004, p.263

Bibliography

Further reading