Stratigraphic range: Late Aptian-Early Cenomanian ~115–97 Ma
PreꞒ
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O
S
D
C
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N
Reconstruction of the fauna from the Riachuelo Formation
Type
Geological formation
Sub-units
Angico Member
Taquari Member
Maruim Member
Underlies
Cotinguiba Formation
Overlies
Muribeca Formation
Thickness
500 m (1,600 ft)
Lithology
Primary
Packstone, Grainstone
Other
Mudstone, siltstone, siliciclastic
Location
Region
Sergipe-Alagoas Basin of Northeastern Brazil
Country
Brazil
Extent
20 kilometres (12 mi)
Type section
Named for
Riachuelo, Sergipe
Named by
Moraes 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]
^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.
^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.
^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". Anuário do Instituto de Geociências (in Portuguese). 28 (1): 80–91. doi:10.11137/2005_1_80-91. ISSN 1982-3908.
^Sobral, A.C.S. (2015). "Amonoides e inoceramideos da Formação Riachuelo, Albiano medioefinal, Bacia de Sergipe, Brasil" (PDF). Universidade Federal de Pernambuco, Recife, PE: 104 pp.
^Cite error: The named reference :4 was invoked but never defined (see the help page).
^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. hdl:2246/2765. S2CID 85575649.
^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.
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the genre of historical painting. He played an important role in the formation of painters in this genre in Brazil. Wikimedia Commons has media related...
War 3,366 Battle of Hampton Roads 1862 American Civil War 392 Battle of Riachuelo 1865 Paraguayan War 997 Battle of the Yalu River 1894 First Sino-Japanese...
paintings, such as Batalha dos Guararapes, Moema and Combate Naval do Riachuelo, as well as portraits and landscapes, of which the Retrato de Dom Pedro...
existence when the three-battalion sized Regimiento de Infanteria de Marina Riachuelo was created in the final stages of the Chaco War of 1932–1935. The Peruvian...
submarines. S5-class- Ballistic missile submarines. Under development Riachuelo-class submarine the first 6,000 tonnes attack submarine, under construction...
War. During the latter the Corps won distinction in both the Battle of Riachuelo and in the taking of Humaitá. The CFN if has participated in the humanitarian...
Paraguayan War where it repelled the Paraguayan Navy in the decisive Battle of Riachuelo. The navy was further augmented with the acquisition of 20 ironclads and...
region, reaching the Santa Teresa Hill (later Mata-Cavalos Street, now Riachuelo Street), as far as Santo Antônio Hill. Through Ajuda Street (today's Melvin...
sudden coup d'état led by a clique of military leaders whose goal was the formation of a republic headed by a dictator, forming the First Brazilian Republic...
Imperial Navy occurred with the incorporation of the ocean-going battleships Riachuelo and Aquidabã (both equipped with torpedo launchers) in 1884 and 1885,...
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