The Marambaia Formation ( pt, Formacão Marambaia) 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
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especial ...
and
marl
Marl is an earthy material rich in carbonate minerals, clays, and silt. When hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae.
Marl makes up the lower part o ...
formation dates to the
Tertiary period and has a maximum thickness of . The formation is a
seal and
reservoir rock of the Atlanta and Oliva Fields in the Santos Basin.
Etymology
The formation is named after
Restinga da Marambaia
The Restinga da Marombas is a restinga in the coast of the Brazilian state of Rio de Janeiro. It is 42 km long and separates Sepetiba Bay from the Atlantic Ocean, being a part of the municipalities of Rio de Janeiro, Itaguaí and Mangarati ...
, Rio de Janeiro.
Description
The Marambaia Formation is between thick,
[Kiang Chang et al., 2008, p.32] and consists of grey
shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especial ...
s and light grey
marl
Marl is an earthy material rich in carbonate minerals, clays, and silt. When hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae.
Marl makes up the lower part o ...
s interbedded with fine-grained
turbiditic
A turbidity current is most typically an underwater current of usually rapidly moving, sediment-laden water moving down a slope; although current research (2018) indicates that water-saturated sediment may be the primary actor in the process. T ...
sandstones. The Marambaia Formation is the deeper lateral equivalent of the
Iguape Formation. This formation in places can be found cropping out at sea bottom. The
depositional environment is thought to be talus and
open marine
Open or OPEN may refer to:
Music
* Open (band), Australian pop/rock band
* The Open (band), English indie rock band
* ''Open'' (Blues Image album), 1969
* ''Open'' (Gotthard album), 1999
* ''Open'' (Cowboy Junkies album), 2001
* ''Open'' (YF ...
basin. Biostratigraphic data indicate a Tertiary age.
[Clemente, 2013, p.24]
The formation is a
seal,
[Contreras, 2011, p.77] and
reservoir rock in the Atlanta and Oliva Fields of the Santos Basin.
[Vieira, 2007, p.10]
See also
*
Campos Basin
The Campos Basin is one of 12 coastal sedimentary basins of Brazil. It spans both onshore and offshore parts of the South Atlantic with the onshore part located near Rio de Janeiro. The basin originated in Neocomian stage of the Cretaceous period ...
References
Bibliography
*
*
*
* {{citation , last=Vieira , first=Juliana , year=2007 , title=Brazil Round 9 - Santos Basin , url=http://www.brasil-rounds.gov.br/round9/arquivos_r9/palestras/Santos(ingles).pdf , publisher=
ANP ANP may refer to:
In politics and government
*Afghan National Police
*''Agência Nacional do Petróleo, Gás Natural e Biocombustíveis'' or National Agency of Petroleum, Natural Gas and Biofuels (Brazil), a regulatory agency in Brazil
*American N ...
, pages=1–73 , accessdate=2017-09-04
Geologic formations of Brazil
Santos Basin
Neogene Brazil
Paleogene Brazil
Neogene System of South America
Paleogene System of South America
Shale formations
Marl formations
Sandstone formations
Deep marine deposits
Turbidite deposits
Reservoir rock formations
Petroleum in Brazil
Formations
Formations
Formations
Formations