Sepetiba Formation

The Sepetiba Formation (Portuguese: Formacão Sepetiba) is a geological formation of the Santos Basin offshore of the Brazilian states of Rio de Janeiro, São Paulo, Paraná and Santa Catarina. The predominantly coquina formation dates to the Pleistocene period to recent and has a variable but maximum thickness of 570 metres (1,870 ft). The formation is the uppermost unit of the Santos Basin.

Sepetiba Formation
Stratigraphic range: Pleistocene-Holocene ~
Type	Geological formation
Unit of	Itamambuca Group
Overlies	Iguape Fm., Marambaia Fm.
Thickness	up to 570 m (1,870 ft)
Lithology
Primary	Coquina
Location
Coordinates	26°6′S 43°43′W
Region	Santos Basin, South Atlantic
Country	Brazil
Type section
Named for	Sepetiba
Location of the Santos Basin

Close-up of a coquina; carbonitic sandstones composed of broken shells

Etymology

The formation is named after Sepetiba, a neighbourhood of Rio de Janeiro.

Description

The Sepetiba Formation is the uppermost formation of the Santos Basin stratigraphy. It has a variable thickness, with a maximum of 570 metres (1,870 ft), due to the proximal erosion of the uppermost part. The formation consists of whitish grey fine to coarse grained carbonitic sands. They are feldspar-rich, glauconitic coquinas consisting of bivalve fragments and foraminifera. The depositional environment is thought to be coastal.

See also

• Campos Basin

References

Bibliography

• Clemente, Pilar (2013), Petroleum geology of the Campos and Santos basins, Lower Cretaceous Brazilian sector of the South Atlantic margin, Danmarks Tekniske Universitet, pp. 1–33, retrieved 2017-09-04
• Kiang Chang, Hung; Assine, Mario Luis; Santos Corrêa, Fernando; Setsuo Tinen, Julio; Campane Vidal, Alexandre; Koike, Luzia (2008), "Sistemas petrolíferos e modelos de acumulação de hidrocarbonetos na Bacia de Santos" (PDF), Revista Brasileira de Geociências, 38: 29–46, doi:10.25249/0375-7536.2008382S2946 (inactive 2024-07-17), retrieved 2017-09-04{{citation}}: CS1 maint: DOI inactive as of July 2024 (link)