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[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.
Fossil content
[edit]The following fossils have been reported from the formation:
- Mammals
| Taxa | Species | Presence | Abundance | Description | Images |
|---|---|---|---|---|---|
| Argyrohyrax[5] | A. proavus | An interatheriid |  | ||
| Cephalomyidae[6] | |||||
| Eopachyrucos[7][8] | E. ranchoverdensis | An interatheriid | |||
| Fiandraia[9] | F. romeii | A notogulate of uncertain lineage | |||
| Proborhyaena[9] | P. gigantea | A sparassodont | |||
| Oligopterna[10] | O. orientalis | A proterotheriid litoptern | |||
| Prohegetotherium[11] | P. schiaffinoi | A hegetotheriidae notoungulate | |||
| Protypotherium[9] | P. sp | ||||
| Scarrittia[12] | S. robusta | A leontiniid | |||
| Urotherium | U. interundatum | A dubious glyptodont | |||
| Uruguaytherium[13] | U. beaulieui | A fragmentary specimen | An astrapotherian mammal | ||
- Birds
| Taxa | Species | Presence | Abundance | Description | Images |
|---|---|---|---|---|---|
| Devincenzia | D. gallinali[14] | A phorusrhacid | |||
| D. pozzi[15] | |||||
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.
- 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
[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; 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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Categories:
- Fray Bentos Formation
- Geologic formations of Uruguay
- Geologic formations of Argentina
- Miocene Series of South America
- Oligocene Series of South America
- Neogene Uruguay
- Paleogene Uruguay
- Neogene Argentina
- Paleogene Argentina
- Deseadan
- Fossiliferous stratigraphic units of South America
- Paleontology in Uruguay
- Paleontology in Argentina
- Geography of Canelones Department
- Geography of Soriano Department
- Geography of Corrientes Province
- Geography of Entre Ríos Province
- Uruguay geography stubs
- South American geologic formation stubs