Earth:Riachuelo Formation

From HandWiki
Short description: Geologic formation in Brazil
Riachuelo Formation
Stratigraphic range: Late Aptian-Early Cenomanian
~115–97 Ma
Riachuelo Formation.png
Reconstruction of the fauna from the Riachuelo Formation
TypeGeological formation
Sub-unitsAngico Member

Taquari Member

Maruim Member
UnderliesCotinguiba Formation
OverliesMuribeca Formation
Thickness500 m (1,600 ft)
Lithology
PrimaryPackstone, Grainstone
OtherMudstone, siltstone, siliciclastic
Location
RegionSergipe-Alagoas Basin of Northeastern Brazil
Country Brazil
Extent20 kilometres (12 mi)
Type section
Named forRiachuelo, Sergipe
Named byMoraes Rego

The Riachuelo Formation is a geologic formation of the Early to Late Cretaceous (Late Aptian to Cenomanian) age in northeastern Brazil 's Sergipe-Alagoas Basin. It is the first Formation of the Basin to contain sediments deposited under fully marine conditions. The formation is subdivided into three members: Angico, Taquari and Maruim.[1]

The formation has provided fossils of ammonites, gastropods, bivalves, brachiopods, serpulids, equinoderms, ostracoids, radiolarians, lobsters and Crabs. Several fish species reported from the Santana Formation also occur in this formation, namely: Cladocyclus gardneri, Neoproscinetes penalvai, Notelops brama, Rhacolepis buccalis, Tharrhias araripis and Vinctifer comptoni.[2][3][4][5] Santanichthys diasii is also reported from the Taquari Member of the Riachuelo Formation.[6] Teeth and vertebrae of elasmobranchii have also been found in the formation.[7]

Description

The Riachuelo Formation is a 500 metres (1,600 ft)[8] thick mix of Aptian and Albian sediments formed by high-energy shelf carbonate deposits (oncolitic-oolitic-peloidal-bioclastic packstones and grainstones), interbedded with lagoonal mudstones and siltstones, and fan-delta like siliciclastic rocks.[9] It overlies Muribeca Formation and underlies the Cotinguiba Formation.[10] The formation sprouts in a track approximately 20 km wide and it extends itself between the cities of Itaporanga d’Ajuda and Pacatuba.[10] It also has outcrops in the cities of Riachuelo, Santa Rosa de Lima, Divina Pastora, Laranjeiras, Rosário do Catete, Maruim, General Maynard and Carmópolis.[11]

There are three members of this formation: Angico Member, whose environment has been interpreted as costal areas consisting of the basin margins and grabens, deltaic fans formed, and the coarse sediments they carried, the Maruim Member, in the lower sedimentation areas,with carbonate ramps and dolomitized oolite/oncolite banks deposited under fluctuating sea level conditions, and the Taquari Member, corresponding to calcareous mudstone and shale from lagoonal and slope environments.[5][11]

Cross section of riachuelo formation's shelf and sea.

Ammonites are particularly plentiful and have provided a firm biocronostratigraphic control for the basin. The succession of ammonites is divided in five zones: The Epicheloniceras-Diadochoceras-Eodouvilleiceras zone, from the Aptian, the Douvilleiceras zone, from the lower Albian, the Oxytropidoceras zone, from the middle Albian, and the Elobiceras and Mortoniceras-Neokentroceras zones, both from the late Albian.[1]

History

The name Riachuelo Formation was used for the first time in the geological literature by Moraes Rego in 1929. Then, in 1959, Bender made a new interpretation, separating the upper part of the Riachuelo Formation from the lower one, naming it Maruim. This lower unit described by Bender was considered by Beurlen K. in 1963 as only one facies of the Riachuelo-Maruim Complex. In 1970, Schaller analyzed the unit again and segmenting it into four members: Angico, Taquari, Maruim and Aguilhada. Feijó, in 1994, classified the formation as a siliciclastic-carbonatic platform complex and divided it into the members: Angico, Taquari and Maruim, which is the classification currently used.[4]

Fossil content

Molluscs

Molluscs of the Riachuelo Formation
Genus Species Presence Family Images
Douvilleiceras[12] D. sergipensis

D. euzebioi

Douvilleiceratidae
Douvilleiceras fossil cropped.png
Puzosia[12] P. rosarica

P. brasiliana
P. garajuana

Desmoceratidae
Puzosia sp Madagascar.PNG
Neokentroceras[12] N. tectorium Brancoceratidae
Elobiceras[4]

E. lobitoense
E. raymondi

Brancoceratidae
Oxytropidoceras[4]

O. buarquianum
O. sergipensis
O. involutum
O. mauryae

Brancoceratidae
Mortoniceras[4] M. sergipensis

M. rostratum

Brancoceratidae
Mortoniceras inflatum 01.JPG
Vectisites[13] V. simplex
Eodouvilleiceras[13] Douvilleiceratidae
Cheloniceras[14] Douvilleiceratidae
Cheloniceras - Madagascar - MUJA.jpg
Diadochoceras[14] Parahoplitidae
Deshayesites[14] Deshayesitidae
Deshayesites deshayesi .jpg
Anisoceras[14] Anisoceratidae
Protanisoceras[14] Anisoceratidae
Protanisoceras creutzbergi - Paja Formation, Colombia.jpg
Inoceramus[12] Indeterminate Inoceramidae
Inocérame (Inoceramus cycloides colossus), exposition Un T-Rex à Paris, Muséum national d'histoire naturelle.jpg
Neocomiceramus[4] N. anglicus Inoceramidae
Neithea[2] N. alpina

N. coquandi
N. hispanica

 Pectinidae
Neithea hispanica.jpg
Linotrigonia[13] Trigoniidae
Pleuromya[13] Pleuromyidae
Klaffmuschel Pleuromya uniformis.jpg
Pinna[13] Pinnidae
Pinnidae - Pinna nobilis-001.jpg
Lopha[13] Ostreidae
Bivalvia - Lopha sp.JPG
Turritella[13] Turritellidae
Turritella communis 01.JPG
Tylostoma[13] Tylostomatidae
Tylostoma.jpg
Natica[13] Naticidae
Natica limacina (MNHN-IM-2000-5233).jpeg

Echinoderms

Echinoderms of the Riachuelo Formation
Genus Species Presence Family Images
Stereocidaris[15] S. branneri Cidaridae
Stereocidaris hawaiiensis.jpg
Rhabdocidaris[15] R. brasiliensis Rhabdocidaridae
Rhabdocidaris orbignyana.jpg
Salenia[15] S. sergipensis Saleniidae
Salenia (Salenia) petalifera MHNT Cénomanien La Heve Ste Adresse 76.jpg
Phymosoma[15] P. binexilis

P. braziliensis

Phymosomatidae
Phymosoma (fóssil) MN 01.jpg
Orthopsis[15] O. australis Orthopsidae
Coenholectypus[15] C. pennanus Holectypidae
Conolypus[15] C. nertoanus
Parapygus[15] P. aequalis Echinolampadidae
6 to 9 is Parapygus antillarum.
Hemiaster[15] H. cranium Hemiasteridae
Hemiaster cordatus (USNM 3232) 002.jpeg
Temnocidaris[13] Cidaridae
Temnocidaris (36311641314).jpg
Douvillaster[13] Toxasteridae
Leptosalenia[13] Saleniidae
Leptosalenia texana.jpg
Phyllobrissus[16] P. humilis Nucleolitidae

Annelids

Annelids of the Riachuelo Formation
Genus Species Presence Family Images
Diploconcha[17] D. riachueloi

D. scalata

Serpulidae
Serpula[17] S. sergipensis Serpulidae
Serpula vermicularis 2.jpg

Crustaceans

Crustaceans of the Riachuelo Formation
Genus Species Presence Family Notes Images
Palinura[3] Indeterminate Angico Member Lobster Only posterior part of the body preserved
Brazilomunida[18] B. brasiliensis Galatheidae (squat lobster)
Archaeopus[17] A. rathbunae Ocypodidae
Cyclothyreus[17] C. sergipensis Dromioidea
Maurimia[18] M. sergipensis Dynomenidae
Galalheites[17] G. brasiliensis Maruim Member Decapoda
Reticulocosta[5] R. edrianae Cytherettidae (ostracod)
Aracajuia[5] A. benderi

A. antiqua

An ostracod
Harbinia[5] H. sinuata An ostracod
Sergipella[5][19] S. viviersae

S. transatlantica
S. grosdidieri

Taquari Member An ostracod
Praebythoceratina[5] P. amsittenensi An ostracod

Fishes

Fishess of the Riachuelo Formation
Genus Species Presence Description Notes Images
Cladocyclus[2] C. gardneri Ichthyodectidae
Cladocyclus.JPG
Neoproscinetes[2] N. penalvai Pycnodontid
Neoproscinetes penalvai.JPG
Mercediella[20] M. riachuelensis Pycnodontid fish Originally described as Camposichthys riachuelensis[7]
Notelops[2] N. brama Elopiform fish
Notelops brama.jpg
Rhacolepis[2] R. buccalis Crossognathiform fish
Rhacolepis buccalis 8743.jpg
Tharrhias[2] T. araripis Gonorynchiform fish
Tharrias araripes “jumping fish”.jpg
Vinctifer[2] V. comptoni Aspidorhynchiform fish
Aspidorhynchidae - Vinctifer comptoni.JPG
Santanichthys[6] S. diasii Taquari Member Characiform fish
Santanichthys.jpg
Beurlenichthys[7] B. ouricuriensis Clupeomorph fish
Nolfia[21] N. riachuelensis Taquari Member Clupeoid fish

References

  1. ↑ 1.0 1.1 Souza-Lima, W; Andrade, E.J (2002). "A bacia de Sergipe-Alagoas: evolução geológica, estratigrafia a e conteúdo fóssil.". Phoenix, Edição Especial 1 (1): 24–25. https://vdocuments.com.br/souza-lima-et-al-2002-phoenix-edicao-especial.html?page=25. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Arai, M (2014). "Aptian/albian (early Cretaceous) paleogeography of the South Atlantic: a paleontological perspective.". Braz. J. Genet. 44 (2): 339–350. doi:10.5327/Z2317-4889201400020012. https://www.researchgate.net/publication/276188854. 
  3. ↑ 3.0 3.1 dos Reis, Márcia Aparecida Fernandes; Turbay, Caio Vinícius Gabrig; Cesero, Pedro De (2005-06-01). "A new Decapoda (Natantia, Malacostraca, Crustacea) from the Riachuelo formation (Albian), Sergipe basin" (in pt). Anuário do Instituto de Geociências 28 (1): 80–91. doi:10.11137/2005_1_80-91. ISSN 1982-3908. https://revistas.ufrj.br/index.php/aigeo/article/view/6275. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Sobral, A.C.S. (2015). "Amonoides e inoceramideos da Formação Riachuelo, Albiano medioefinal, Bacia de Sergipe, Brasil". Universidade Federal de Pernambuco, Recife, PE: 104 pp. https://attena.ufpe.br/bitstream/123456789/14942/1/TESE%20Anderson%20C%20S%20Sobral%202015.pdf. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Antonietto, Lucas S.; do Carmo, Dermeval A. (2015). "Biostratigraphic and paleozoogeographic review of the upper Aptian-Albian ostracods of Riachuelo Formation, Sergipe-Alagoas Basin, Northeastern Brazil". Sociedade Brasileira de Paleontologia 18 (3): 355–368. doi:10.4072/rbp.2015.3.02. https://www.researchgate.net/publication/289556930. 
  6. ↑ 6.0 6.1 Filleul, Arnaud; Maisey, John G. (2004). "Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships". American Museum Novitates (3455): 1–12. doi:10.1206/0003-0082(2004)455<0001:ROSDOC>2.0.CO;2. https://zenodo.org/record/5382553. 
  7. ↑ 7.0 7.1 7.2 Gallo, Valéria; de Figueiredo, Francisco J. (2012). Síntese da paleoictiofauna marinha das bacias costeiras do Brasil e comentários sobre a paleoictiofauna cronocorrelata da margem oeste da África. Interciencias. pp. 177–208. ISBN 978-85-7193-236-4. https://www.researchgate.net/publication/288837784. 
  8. ↑ Bengtson, P.; Zucon, M. H.; Sobral, A. da C. S. (2018). "Cretaceous ammonite zonation of the Sergipe Basin, northeastern Brazil". Cretaceous Research 88: 111–122. doi:10.1016/j.cretres.2017.07.021. https://www.sciencedirect.com/science/article/abs/pii/S019566711730215X. 
  9. ↑ Turbay, Caio V.G.; Cesero, Pedro; Koutsoukos, Eduardo A. (2002). "On a fossil lobster (Decapoda, Malacostraca, Crustacea) from the Riachuelo Formation, Albian of the Sergipe Basin, Brazil". An. Acad. Bras. Ciênc. 74 (2): 363. doi:10.1590/S0001-37652002000200013. 
  10. ↑ 10.0 10.1 MANSO, C. L. de C.; SOUZA-LIMA, Wagner (2012). "NOVOS EQUINÓIDES PARA O INTERVALO APTIANO-ALBIANO (CRETÁCEO INFERIOR) DA SUB-BACIA DE SERGIPE, NORDESTE DO BRASIL". Geociências 31 (4): 584–605. 
  11. ↑ 11.0 11.1 da Silva, C. R. M.; Barros, S. D. S. (2017). "AVALIAÇÃO DO POTENCIAL DE FOSFATO NO BRASIL – PARTE III: BACIA SERGIPE-ALAGOAS, ÁREA SUB-BACIA SERGIPE ESTADO DE SERGIPE". Serviço Geológico do Brasil (20). 
  12. ↑ 12.0 12.1 12.2 12.3 Beurlen, G. (1967). "Ammonoidea do complexo Riachuelo-Maruim, Sergipe.". Boletim da Sociedade Brasileira de Geologia 16 (2): 79–106. 
  13. ↑ 13.00 13.01 13.02 13.03 13.04 13.05 13.06 13.07 13.08 13.09 13.10 13.11 Vieira, Fabiana S.; Dantas, M. A. T. (2014). "SERPULIDS (ANNELIDA, POLYCHAETA) AT EARLY CRETACEOUS OF SERGIPE BASIN, BRAZIL SERPULIDE (ANNELIDA, POLYCHAETA) DO CRETÁCEO INFERIOR DA BACIA SERGIPE, BRASIL". Estudos Geológicos 24 (2): 83–88. doi:10.18190/1980-8208/estudosgeologicos.v24n2p83-88. 
  14. ↑ 14.0 14.1 14.2 14.3 14.4 Beurlen, Karl (1968). "A POSIÇÃO ESTRATIGRAFICA DA FORMAÇÃO RIACHUELO – (Cretáceo, Sergipe)". Sociedade Brasileira de Geologia 17 (1): 85–88. 
  15. ↑ 15.0 15.1 15.2 15.3 15.4 15.5 15.6 15.7 15.8 Brito, Ignacio M. (1991). "OS EQUINÓIOES AlBIANOS (CRETÁCEO INFERIOR) DO BRASil E SEU POSSíVEL VALOR ESTRATIGRÁFICO". Anuário do Instituto de Geociências 14: 37–40. doi:10.11137/1991_0_37-40. 
  16. ↑ Manso, C.L.C. (2020). "A new Cassiduloid (Echinodermata, Echinoidea) in the Albian of the Sergipe-Alagoas basin, Brazil". Brazil.- Carnets Geol. 20 (3): 29–35. doi:10.4267/2042/70719. http://paleopolis.rediris.es/cg/20/03/. 
  17. ↑ 17.0 17.1 17.2 17.3 17.4 Barreto, A. M. F.; Oliveira, E. V. (2014). "CATÁLOGO DO MATERIAL-TIPO DA COLEÇÃO PALEONTOLÓGICA DO DEPARTAMENTO DE GEOLOGIA, CENTRO DE TECNOLOGIA E GEOCIÊNCIAS DA UNIVERSIDADE FEDERAL DE PERNAMBUCO". Estudos Geológicos 24 (3): 3–53. doi:10.18190/1980-8208/estudosgeologicos.v24n3p3-53. https://www.researchgate.net/publication/270959190. 
  18. ↑ 18.0 18.1 Neto, R.G.Martins (2005). "ESTÁGIO ATUAL DA PALEOARTROPODOLOGIA BRASILEIRA: HEXÁPODES, MIRIÁPODES, CRUSTÁCEOS (ISOPODA, DECAPODA, EUCRUSTACEA E COPEPODA) E QUELICERADOS". Arquivos do Museu Nacional 63 (3): 471–494. 
  19. ↑ Do Carmo, Dermeval A.; Colin, Jean-Paul (2012). "Reassessment of the genus Sergipella Krömmelbein, 1967 (Ostracoda,Trachyleberididae), uppermost Aptian-Albian of Brazil and West Africa:Taxonomy and paleogeographic distribution". Revue de micropaléontologie 55: 3–15. doi:10.1016/j.revmic.2011.12.002. https://www.researchgate.net/publication/229150538. 
  20. ↑ Koerber, Stefan (2012). "Mercediella nom. nov., a replacement name forCamposichthys Figueiredo & Silva Santos, 1991(Pisces: Pycnodontiformes)". Bonn Zoological Bulletin 61 (1): 29–30. https://www.researchgate.net/publication/272942405. 
  21. ↑ de Figueiredo, Francisco J. (2009). "A new marine clupeoid fish from the Lower Cretaceous of the Sergipe-Alagoas Basin, northeastern Brazil". Zootaxa 2164: 21–32. doi:10.11646/zootaxa.2164.1.2. https://www.researchgate.net/publication/287713511. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Earth:Riachuelo_Formation&oldid=3294284"