The Bauru Group is a geological

group A group is a number of persons or things that are located, gathered, or classed together. Groups of people * Cultural group, a group whose members share the same cultural identity * Ethnic group, a group whose members share the same ethnic iden ...

of the Bauru Sub-basin,

Paraná Basin The Paraná Basin ( pt, Bacia do Paraná, es, Cuenca del Paraná) is a large cratonic sedimentary basin situated in the central-eastern part of South America. About 75% of its areal distribution occurs in Brazil, from Mato Grosso to Rio Grande d ...

Minas Gerais Minas Gerais () is a state in Southeastern Brazil. It ranks as the second most populous, the third by gross domestic product (GDP), and the fourth largest by area in the country. The state's capital and largest city, Belo Horizonte (literally ...

São Paulo São Paulo (, ; Portuguese for 'Saint Paul') is the most populous city in Brazil, and is the capital of the state of São Paulo, the most populous and wealthiest Brazilian state, located in the country's Southeast Region. Listed by the GaWC a ...

General Salgado General Salgado is a municipality in the state of São Paulo, Brazil. The city has a population of 10,862 inhabitants and an area of 493.3 km². General Salgado belongs to the Mesoregion of São José do Rio Preto The Mesoregion of São Jo ...

, Itapecuru-Mirim,

Mato Grosso Mato Grosso ( – lit. "Thick Bush") is one of the states of Brazil, the third largest by area, located in the Central-West region. The state has 1.66% of the Brazilian population and is responsible for 1.9% of the Brazilian GDP. Neighboring ...

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

whose strata date back to the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

. Dinosaur remains are among the fossils that have been recovered from the formation.

Subdivisions

According to a 2016 study:

The Bauru Basin covers an area of approximately 379.362 km2 located almost exclusively in Brazil.., with selected outcrops in Northeastern Paraguay (Fúlfaro, 1996). This Cretaceous sedimentary succession reflects changing nonmarine environments, such as eolian, lacustrine, fluvial and alluvial fans.

The Bauru Group was divided by Fernandes and Coimbra (1996) in four formations, namely

Adamantina Adamantina is a municipality in the state of São Paulo, Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 mi ...

Uberaba Uberaba () is a city in the state of Minas Gerais, southeast Brazil. It is located in the Brazilian Highlands at above sea level on the Uberaba River, and away from the state capital, Belo Horizonte. The city status was granted in 1856, and i ...

Araçatuba Araçatuba is a city located in the northwest of São Paulo state, Brazil. The city has 198,129 inhabitants (IBGE/2020) and spans . The city name comes from the Tupi language and means "abundance of araçá (a fruit, Psidium cattleianum)". Ara� ...

and

Marília Marília () is a Brazilian municipality in the midwestern region of the state of São Paulo. Its distance from the state capital São Paulo is by highway, by railway and in a straight line. It is located at an altitude of 675 meters. The popula ...

. In 1998, Fernandes revised the group and recognize six formations, Uberaba, Vale do Rio do Peixe,

São José do Rio Preto São José do Rio Preto () is a municipality in the state of São Paulo, Brazil. The city is located at the northwest portion of the state, 440 km (273 mi) from the city of São Paulo and 700 km (435 mi) from Brasília. As of ...

, Presidente Prudente and Marília. The Adamantina Formation was divided in Vale do Rio do Peixe,

and

Presidente Prudente Formation The Presidente Prudente Formation is a geological formation of the Bauru Group in the Paraná Basin, located in Brazil whose strata date back to the Late Campanian to Early Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, ...

Vertebrate paleofauna

Molluscan paleofauna

Gastropoda

* ''

Physa aridi ''Physa aridi'' is a fossil species of air-breathing freshwater snail, an extinct aquatic pulmonate gastropod mollusk in the family Physidae. This species has a small, left-handed (or sinistral) shell, as is always the case in this family. ...

'' Mezzalira, 1974Simone, L.R.L. & Mezzalira, S. 1994. Fossil Molluscs of Brazil. Boletim do Instituto Geológico 11: 1–202. * ''

Physa mezzalirai ''Physa mezzalirai'' is a fossil species of extinct air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae. This species has a small and left-handed (or sinistral) shell, as is always the case in this f ...

'' Ghilardi, Carbonaro & Simone, 2011Ghilardi,RP; Carbonaro, FA; & Simone, LRL. 2011. Physa mezzalirai, a new cretaceous basommatophoran from Adamantina formation, Brazil. Strombus 18(1-2): 1-14. * ''

Viviparus souzai ''Viviparus'', common name the river snails, is a genus of large, freshwater snails with an operculum, aquatic gastropod mollusks.Bouchet, P. (2014). Viviparus Montfort, 1810. Accessed through: World Register of Marine Species at http://www.ma ...

'' Mezzalira, 1974

Bivalvia

* '' Anodontites freitasi'' Mezzalira, 1974 * '' Anodontites pricei'' Mezzalira, 1974 * ''

Diplodon arrudai ''Diplodon'' is a genus of freshwater pearly mussel, an aquatic bivalve in the Hyriidae family. The genus includes the following species: * '' Diplodon chilensis'' * '' Diplodon dunkerianus'' * '' Diplodon expansus'' * '' Diplodon fontaineanus' ...

'' Mezzalira, 1974 * '' Florenceia peiropolensis'' Mezzalira, 1974 * '' Itaimbea priscus'' (Ihering, 1913) * '' Monocondylaea cominatoi'' Mezzalira, 1974 * '' Sancticarolis tolentinoi'' Mezzalira, 1974 * '' Taxodontites paulistanensis'' (Mezzalira, 1974)

References