View source for Earth:Jureia Formation

{{Short description|Geological formation of the Santos Basin near Brazil}}
{{Infobox rockunit
| name           = Jureia Formation
| period         = Maastrichtian
| age            = [[Earth:Santonian|Santonian]]-[[Earth:Maastrichtian|Maastrichtian]]<br />~{{fossil range|86|66}}
| image          = 
| imagesize      = 
| caption        = 
| type           = [[Earth:Geological formation|Geological formation]]
| prilithology   = [[Chemistry:Shale|Shale]]
| otherlithology = [[Earth:Siltstone|Siltstone]], [[Earth:Sandstone|sandstone]]
| unitof         = Frade Group
| subunits       = 
| underlies      = [[Earth:Marambaia Formation|Marambaia Formation]]
| overlies       = [[Earth:Itanhaém Formation|Itanhaém Formation]]
| thickness      = up to {{convert|2000|m|ft|abbr=on}}
| area           = 
| map            = Santos basin map.png
| map_caption    = Location of the Santos Basin
| location       =
| coordinates    = {{coord|26|6|S|43|43|W|display=inline,title}} 
| region         = Santos Basin, [[Earth:Atlantic Ocean#South Atlantic|South Atlantic]]
| country        = {{BRA}}
| extent         = <!--{{convert||mi|km}}-->
| namedfor       = Jureia-Itatins Ecological Station
| namedby        = 
| year_ts        = 
| location_ts    = 
| coordinates_ts = 
| paleocoordinates_ts = 
| region_ts      = 
| country_ts     = 
| thickness_ts   = 
}}
The '''Jureia Formation''' ({{lang-pt|Formacão Jureia}}) is a geological formation of the Santos Basin offshore of the {{wipe|Brazil}}ian states of Rio de Janeiro, São Paulo, Paraná and Santa Catarina. The predominantly [[Chemistry:Shale|shale]] with interbedded [[Earth:Siltstone|siltstone]]s and fine [[Earth:Sandstone|sandstone]]s formation dates to the [[Earth:Late Cretaceous|Late Cretaceous]] period; [[Earth:Santonian|Santonian]]-[[Earth:Maastrichtian|Maastrichtian]] epochs and has a maximum thickness of {{convert|2000|m|ft}}. The formation is a [[Earth:Petroleum reservoir|reservoir rock]] of the Merluza Field, the first discovery in the Santos Basin.

== Etymology ==
The formation is named after the Jureia-Itatins Ecological Station, São Paulo.

== Description ==
[[File:Turbidite formation.jpg|thumb|right|330px|The turbidites of the Jureia Formation were deposited at the shelf edge of the Brazilian continental margin]]
The Jureia Formation is {{convert|952|to|2000|m|ft}} thick,<ref name=Kiang2008_p32>Kiang Chang et al., 2008, p.32</ref> and includes a succession of clastics between the coarse facies of the [[Earth:Santos Formation|Santos Formation]] in the western proximal part and the fine-grained clastics of the Itajai-Açu Formation in the eastern distal part of the Santos Basin. The formation is characterized by dark grey to greenish and brown [[Chemistry:Shale|shale]]s, dark grey [[Earth:Siltstone|siltstone]]s, fine-very fine [[Earth:Sandstone|sandstone]]s and light ochre calcisilts. The depositional environment is thought to be of a marine platform setting as pro-delta facies on the shelf edge.<ref name=Contreras2011_p104>Contreras, 2011, p.104</ref> The age based on palynomorphs and [[Earth:Calcareous nannofossils|calcareous nannofossils]] is [[Earth:Late Cretaceous|Late Cretaceous]] ([[Earth:Santonian|Santonian]]-[[Earth:Maastrichtian|Maastrichtian]]).<ref name=Clemente2013_p23>Clemente, 2013, p.23</ref> Two new [[Biology:Ostracod|ostracod]] species were identified in the drilling cuttings of wells drilled into the Santonian-[[Earth:Campanian|Campanian]] section, ''?Afrocytheridea cretacea'' and ''Pelecocythere dinglei''.<ref name=Piovesan2010_p177>Piovesan, 2010, p.177</ref>

The formation is the [[Earth:Petroleum reservoir|reservoir rock]] of the Merluza Field, the first discovery in 1979 of the Santos Basin.<ref name=KaroonList>{{Cite web |url=http://www.karoon.com.br/en/index.php/proyecto-brasil/?img=6&id=38 |title=Santos Basin Fields |access-date=2017-09-07 |archive-url=https://web.archive.org/web/20170907123836/http://www.karoon.com.br/en/index.php/proyecto-brasil/?img=6&id=38 |archive-date=2017-09-07 |url-status=dead }}</ref><ref name=Juarez2007_p19>Vieira, 2007, p.19</ref>

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== See also ==
* Campos Basin

{{clearboth}}

== References ==
{{reflist|20em}}

=== Bibliography ===
* {{cite LSA |last=Clemente |first=Pilar |year=2013 |title=Petroleum geology of the Campos and Santos basins, Lower Cretaceous Brazilian sector of the South Atlantic margin |url=https://www.researchgate.net/profile/Pilar_Clemente/publication/236972647_Petroleum_geology_of_the_Campos_and_Santos_basins_Lower_Cretaceous_Brazilian_sector_of_the_South_Atlantic_margin/links/0deec51a8c68082bc8000000.pdf |publisher=Danmarks Tekniske Universitet |pages=1–33 |accessdate=2017-09-04}}
* {{cite LSA |last=Contreras |first=Jorham |year=2011 |title=Seismo-stratigraphy and numerical basin modeling of the southern Brazilian continental margin (Campos, Santos, and Pelotas basins) (PhD thesis) |url=http://archiv.ub.uni-heidelberg.de/volltextserver/12323/1/Promotion_JContreras.pdf |publisher=[[Organization:Heidelberg University|Ruprecht-Karls-Universität Heidelberg]] |pages=1–171 |accessdate=2017-09-04}}
* {{cite LSA |last=Kiang Chang |first=Hung |last2=Assine |first2=Mario Luis |last3=Santos Corrêa |first3=Fernando |last4=Setsuo Tinen |first4=Julio |last5=Campane Vidal |first5=Alexandre |last6=Koike |first6=Luzia |year=2008 |title=Sistemas petrolíferos e modelos de acumulação de hidrocarbonetos na Bacia de Santos |url=http://geomuseu.ist.utl.pt/GSP2012/GSP2009/Casos%20de%20estudo%20SP/GSP%20Bacia%20Santos.pdf |journal=Revista Brasileira de Geociências |volume=38 |pages=29–46 |accessdate=2017-09-04}}
* {{cite LSA |last=Piovesan |first=Enelise Katia |last2=Trescastro Bergue |first2=Cristianini |last3=Fauth |first3=Gerson |year=2010 |title=New ostracode species from the Upper Cretaceous of the Santos Basin, Brazil |url=http://www.sbpbrasil.org/revista/edicoes/13_3/175a180_New%20Ostracode%20Species.pdf |journal=Revista Brasileira de Paleontologia |volume=13 |pages=175–180 |accessdate=2017-09-04}}
* {{cite LSA |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 |pages=1–73 |accessdate=2017-09-04 }} {{Webarchive|url=https://web.archive.org/web/20170203223629/http://www.brasil-rounds.gov.br/round9/arquivos_r9/palestras/Santos(ingles).pdf |date=2017-02-03 }}

{{DEFAULTSORT:Jureia Formation}}
[[Category:Campanian Stage]]
[[Category:Santonian Stage]]
[[Category:Shale formations]]
[[Category:Siltstone formations]]
[[Category:Sandstone formations]]
[[Category:Reservoir rock formations]]

{{Sourceattribution|Jureia Formation}}