Fray Bentos Formation
| Fray Bentos Formation | |
|---|---|
| Stratigraphic range: Deseadan (Middle Oligocene - Early Miocene) ~ | |
| 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 |
The Fray Bentos Formation is a Deseadan geologic formation of the Paysandú Group in Uruguay and portions of Argentina, corresponding to the Paraná Basin. 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.
Fossil content
The following fossils have been reported from the formation:
- Mammals
| Taxa | Species | Presence | Abundance | Description | Images |
|---|---|---|---|---|---|
| Argyrohyrax | A. proavus | An interatheriid |  | ||
| Cephalomyidae | |||||
| Eopachyrucos | E. ranchoverdensis | An interatheriid | |||
| Fiandraia | F. romeii | A notogulate of uncertain lineage | |||
| Proborhyaena | P. gigantea | A sparassodont | |||
| Oligopterna | O. orientalis | A proterotheriid litoptern | |||
| Prohegetotherium | P. schiaffinoi | A hegetotheriidae notoungulate | |||
| Protypotherium | P. sp | ||||
| Scarrittia | S. robusta | A leontiniid | |||
| Urotherium | U. interundatum | A dubious glyptodont | |||
| Uruguaytherium | U. beaulieui | A fragmentary specimen | An astrapotherian mammal | ||
- Birds
| Taxa | Species | Presence | Abundance | Description | Images |
|---|---|---|---|---|---|
| Devincenzia | D. gallinali | A phorusrhacid | |||
| D. pozzi | |||||
See also
References
- ↑ 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.
- 1 2 3 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.
- ↑ Badin, A. C.; Corona, A.; Cruz, L. E.; Perea, D. (2026). "A new genus and species of Proterotheriidae (Mammalia, Litopterna) from the Fray Bentos Formation (late Oligocene, Deseadan SALMA), Uruguay". Journal of Vertebrate Paleontology e2666240. doi:10.1080/02724634.2026.2666240.
- ↑ Prohegetotherium schiaffinoi at Fossilworks.org
- ↑ Ubilla, Martín; Perea, Daniel; Bond, Mariano (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. doi:10.1016/S0016-6995(06)80217-2. ISSN 0016-6995.
- ↑ Uruguaytherium beaulieui at Fossilworks.org
- ↑ Devincenzia gallinali at Fossilworks.org
- ↑ Devincenzia pozzi at Fossilworks.org
Bibliography
- 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; López, Guillermo; Reguero, Marcelo A.; Scillato Yané, Gustavo J.; Vucetich, María G. (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, retrieved 2018-09-12
- Tófalo, Ofelia Rita; Morrás, Héctor J.M. (2009), "Evidencias paleoclimáticas en duricostras, paleosuelos y sedimentitas silicoclásticas, del Cenozoico de Uruguay" (PDF), Revista de la Asociación Geológica Argentina: 674–686, retrieved 2018-09-12
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