Jureia Formation
| Jureia Formation | |
|---|---|
| Stratigraphic range: Santonian-Maastrichtian ~ | |
| Type | Geological formation |
| Unit of | Frade Group |
| Underlies | Marambaia Formation |
| Overlies | Itanhaém Formation |
| Thickness | up to 2,000 m (6,600 ft) |
| Lithology | |
| Primary | Shale |
| Other | Siltstone, 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 | Jureia-Itatins Ecological Station |
Location of the Santos Basin | |
The Jureia Formation (Portuguese: Formacão Jureia) 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 with interbedded siltstones and fine sandstones formation dates to the Late Cretaceous period; Santonian-Maastrichtian epochs and has a maximum thickness of 2,000 metres (6,600 ft). The formation is a reservoir rock of the Merluza Field, the first discovery in the Santos Basin.