Santos Formation

The Santos Formation (Portuguese: Formacão Santos) 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 conglomeratic sandstone formation with interbedded shales dates to the Late Cretaceous period; Cenomanian-Maastrichtian epochs and has a maximum thickness of 2,700 metres (8,900 ft).

Santos Formation
Stratigraphic range: Cenomanian-Maastrichtian
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TypeGeological formation
Unit ofFrade Group
UnderliesIguape Formation
OverliesFlorianópolis Formation
Thicknessup to 2,700 m (8,900 ft)
Lithology
PrimaryConglomerate
OtherSandstone, shale
Location
Coordinates26°6′S 43°43′W
RegionSantos Basin, South Atlantic
Country Brazil
Type section
Named forSantos

Location of the Santos Basin

Etymology

The formation is as the Santos Basin named after the city of Santos, São Paulo.

Description

The Santos Formation is 1,275 to 2,700 metres (4,183 to 8,858 ft) thick,[1] and consists of reddish lithic conglomerates and sandstones, interbedded with grey shales and reddish clays. These facies are interbedded and change laterally into the Itajai-Açu and Juréia Formations. The depositional environment is thought to be transitional continental to marginal marine, ranging from alluvial to braided rivers and deltas. Biostratigraphic data indicate a Late Cretaceous age (Cenomanian-Maastrichtian).[2]

See also

References

  1. Kiang Chang et al., 2008, p.32
  2. Clemente, 2013, p.23

Bibliography

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