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
~2.6–0 Ma
↓
TypeGeological formation
Unit ofItamambuca Group
OverliesIguape Fm., Marambaia Fm.
Thicknessup to 570 m (1,870 ft)
Lithology
PrimaryCoquina
Location
Coordinates26°6′S 43°43′W
RegionSantos Basin, South Atlantic
Country Brazil
Type section
Named forSepetiba

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),[1] 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.[2]

gollark: Milo has to be manually configured for new chests.
gollark: PotatOS is good and uninstallable actually.
gollark: I definitely made one.
gollark: Did I forget to give you that?
gollark: I should have a few hundred in storage.

See also

References
  1. Kiang Chang et al., 2008, p.32
  2. Clemente, 2013, p.24

Bibliography
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