The Fray Bentos Formation is a Deseadan[1] geologic formation of the Paysandú Group in Uruguay and portions of Argentina,[2] corresponding to the Paraná Basin.[3][4] It is composed of calcareous sandstones and siltstones with a pinkish-orange coloration. It outcrops in southwestern Uruguay (Canelones and Soriano Departments), the central and southeastern part of the province of Corrientes and northeast Entre Ríos.
| Fray Bentos Formation | |
|---|---|
| Stratigraphic range: Deseadan ~ | |
| Type | Geological formation |
| Unit of | Paysandú Group |
| Underlies | Raigón Formation |
| Overlies | Asencio Formation |
| Lithology | |
| Primary | sandstone |
| Other | siltstone |
| Location | |
| Country |  Uruguay Argentina |
| Extent | Paraná Basin |
| Type section | |
| Named for | Fray Bentos |
| Named by | Bossi |
| Year defined | 1966 |
  Fray Bentos Formation, Uruguay | |
Fossil content edit
The following fossils have been reported from the formation:
- Mammals
- Argyrohyrax[5]
- Cephalomyidae[6]
- Eopachyrucos[7][8]
- Fiandraia[9]
- Proborhyaena[9]
- Prohegetotherium schiaffinoi[10]
- Protypotherium[9]
- Scarrittia[11]
- Uruguaytherium beaulieui[12]
- Birds
See also edit
References edit
- ^ Fray Bentos Formation at Fossilworks.org
- ^ Benvenuto, Andrés (2017). "Arquitectura de facies y ambientes deposicionales de la Formación Fray Bentos (Oligoceno) en Uruguay". CSIC (in Spanish).
- ^ Bond et al., 1998, p.42
- ^ Tófalo & Morrás, 2009, p.680
- ^ Hernández Del Pino, Santiago; Seoane, Federico; Cerdeño, Esperanza (2022). "New craniodental information and taxonomic decisions of the typotherians (Notoungulata) from the late Oligocene of Mendoza, central-western Argentina". Acta Palaeontologica Polonica. 67. doi:10.4202/app.00974.2022. hdl:11336/202725. ISSN 0567-7920.
- ^ Cephalomyidae at Fossilworks.org
- ^ Dozo, María Teresa; Ciancio, Martín; Bouza, Pablo José; Martínez, Gastón (2014). "New association of Paleogene Mammals in Eastern of Patagonia (Chubut Province, Argentina): biochronological and paleobiogeographical implications". Andean Geology. 41 (1). doi:10.5027/andgeoV41n1-a09. hdl:11336/27088.
- ^ Reguero, Marcelo A.; Ubilla, Martín; Perea, Daniel (2003-06-17). "A new species of Eopachyrucos (Mammalia, Notoungulata, Interatheriidae) from the Late Oligocene of Uruguay". Journal of Vertebrate Paleontology. 23 (2): 445–457. doi:10.1671/0272-4634(2003)023[0445:ANSOEM]2.0.CO;2. ISSN 0272-4634.
- ^ a b c Mones, A.; Ubilla, M. (1978). "La Edad Deseadense (Oligoceno inferior) de la Formación Fray Bentos y su contenido paleontológico, con especial referencia a la presencia de Proborhyaena cf. gigantea Ameghino (Marsupialia: Borhyaenidae) en el Uruguay. Nota preliminar". Comunicaciones Paleontológicas del Museo de Historia Natural de Montevideo. 7 (1): 151–158.
- ^ Prohegetotherium schiaffinoi at Fossilworks.org
- ^ Scarrittia at Fossilworks.org
- ^ Uruguaytherium beaulieui at Fossilworks.org
- ^ Devincenzia gallinali at Fossilworks.org
- ^ Devincenzia pozzi at Fossilworks.org
Bibliography edit
- D. Perea, P. Toriño, and M. R. Ciancio. 2014. La presencia del Xenartro Palaeopeltis inornatus Ameghino, 1894, en la Formación Fray Bentos (Oligoceno Tardío), Uruguay. Ameghiniana 51(3):254-258
- M. Ubilla, D. Perea, and M. Bond. 1994. The Deseadan Land Mammal Age in Uruguay and the report of Scarrittia robusta nov. sp. (Leontiniidae, Notoungulata) in the Fray Bentos Formation (Oligocene - ? Lower Miocene). Geobios 27(1):95-102
- Bond, Mariano; Guillermo López; Marcelo A. Reguero; Gustavo J. Scillato Yané, and María G. Vucetich. 1998. Los mamíferos de la Formación Fray Bentos (Edad mamífero Deseadense, Oligoceno Superior) de las provincias de Corrientes y Entre Ríos, Argentina. Asociación Paleontológica Argentina. Publicación Especial 5. 41–50. Accessed 2018-09-12.
- Tófalo, Ofelia Rita, and Héctor J.M. Morrás. 2009. Evidencias paleoclimáticas en duricostras, paleosuelos y sedimentitas silicoclásticas, del Cenozoico de Uruguay. Revista de la Asociación Geológica Argentina. 674–686. Accessed 2018-09-12.
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