Itanhaém Formation
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| Itanhaém Formation | |
|---|---|
| Stratigraphic range: Early Albian ~ | |
| Type | Geological formation |
| Unit of | Camburi Group |
| Underlies | Itajaí-Açu Fm., Juréia Fm. |
| Overlies | Ariri Formation |
| Thickness | up to 1,500 m (4,900 ft) |
| Lithology | |
| Primary | Shale, siltstone, marl |
| Other | Sandstone |
| Location | |
| Coordinates | 26°6′S 43°43′W / 26.100°S 43.717°W |
| Region | Santos Basin, South Atlantic |
| Country | Brazil |
| Type section | |
| Named for | Itanhaém |
 Location of the Santos Basin | |
The Itanhaém Formation (Portuguese: Formacão Itanhaém) 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 shale formation with marls, siltstones and sandstones dates to the Early Cretaceous period; Early Albian epoch and has a maximum thickness of 1,500 metres (4,900 ft). The formation is the reservoir rock of the Tambaú Field in the Santos Basin.
The formation is named after the town of Itanhaém, São Paulo.
