| Areado Group | |
|---|---|
| Stratigraphic range: Tithonian-Albian ~150–100 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
| Type | Group |
| Sub-units | Três Barras, Quiricó & Abaeté Formations |
| Underlies | Mata da Corda Group |
| Overlies | Bambuí Group |
| Lithology | |
| Primary | Sandstone, claystone, conglomerate |
| Location | |
| Coordinates | 18°12′S 45°42′W / 18.2°S 45.7°W / -18.2; -45.7 |
| Approximate paleocoordinates | 17°06′S 12°06′W / 17.1°S 12.1°W / -17.1; -12.1 |
| Region | Minas Gerais |
| Country |  Brazil |
| Extent | São Francisco Basin |
| Type section | |
| Named by | Cardoso |
| Year defined | 1968 |
  Areado Group (Brazil) | |
The Areado Group is a Late Jurassic to Early Cretaceous (Tithonian to Albian; covering approximately 50 million years) geologic group in southeastern Brazil. The group was defined by Cardoso in 1968.
Various fossil theropod tracks have been reported from the aeolic sandstones of the group.
Stratigraphy
The group contains the following formations from young to old:
- Albian Três Barras Formation - eolian and fluvio-deltaic sandstones
- Aptian Quiricó Formation - lacustrine claystones
- Tithonian-Barremian Abaeté Formation - fluvial conglomerates
See also
References
- Carvalho & Kattah, 1998, p.56
- Carvalho & Kattah, 1998, p.54
- Carvalho & Kattah, 1998, pp.57-61
- Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- Cristóvão Baptista, 2004, p.19
Bibliography
- Cristóvão Baptista, Marcos (2004), Estratigrafia e evolução geológica da região de Lagoa Formosa (MG) (MSc. thesis) (PDF), Universidade Federal de Minas Gerais, pp. 1–116, retrieved 2018-09-08
- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21
- Carvalho, I. d. S.; Kattah, S. d. S. (1998), "Dinosaur footprints from Sanfranciscana Basin, Minas Gerais State, Brazil", Anais da Academia Brasileira de Ciências, 70: 53–67, retrieved 2020-06-28
- Geologic groups of South America
- Geologic formations of Brazil
- Jurassic System of South America
- Late Jurassic South America
- Jurassic Brazil
- Tithonian Stage
- Lower Cretaceous Series of South America
- Cretaceous Brazil
- Albian Stage
- Aptian Stage
- Barremian Stage
- Hauterivian Stage
- Valanginian Stage
- Berriasian Stage
- Sandstone formations
- Conglomerate formations
- Shale formations
- Aeolian deposits
- Deltaic deposits
- Fluvial deposits
- Lacustrine deposits
- Ichnofossiliferous formations
- Geography of Minas Gerais