Botucatu Formation
Stratigraphic range: Aptian
TypeGeological formation
Unit ofSão Bento Group
UnderliesSerra Geral Formation
OverliesRio do Rasto Formation
Lithology
PrimarySandstone
Location
Coordinates29°42′S 52°24′W / 29.7°S 52.4°W / -29.7; -52.4
Approximate paleocoordinates30°36′S 19°30′W / 30.6°S 19.5°W / -30.6; -19.5
RegionRio Grande do Sul
Country Brazil
 Uruguay
ExtentParaná & Pelotas Basins
Type section
Named forBotucatu

Geologic map of the Paraná Basin with the Paleozoic and Mesozoic units in light blue

The Botucatu Formation is an Aptian geologic formation of the Paraná and Pelotas Basins in southern Brazil and northern Uruguay. The formation is composed of quartzitic sandstones, deposited in an eolian environment.[1] Fossil theropod tracks have been reported from the formation.[2]

Description

The sandstone is fine-textured and well sorted, containing no pebbles; its colour is occasionally white, yellowish, and reddish, but more commonly it is pinkish. Nearly always it is silicified and therefore compact and hard.[3] The formation was deposited in an arid desert environment, characterized by sabkhas and wadis.[4]

Fossil content

Among the following fossils were reported from the Botucatu Formation:[3]

Ichnofossils

See also

References

  1. ^ Petrolli & Pimentel, 2014, p.1
  2. ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  3. ^ a b São Bento quarry, Araraquara at Fossilworks.org
  4. ^ a b Leonardi, 1994, p.50
  5. ^ Leonardi, Giuseppe; Fernandes, Marcelo Adorna; Carvalho, Ismar de Souza; Schutzer, Julia Beatrice; Silva, Rafael Costa da (2023-09-30). "Farlowichnus rapidus new ichnogen., new ichnosp.: A speedy and small theropod in the Early Cretaceous Botucatu paleodesert (Paraná Basin), Brazil". Cretaceous Research: 105720. doi:10.1016/j.cretres.2023.105720. ISSN 0195-6671.

Bibliography

Further reading

Categories