Miocene heterozoan carbonate systems from the western Atlantic equatorial margin in South America: The Pirabas formation

Aguilera, Orangel; Bencomo, Karen; Araújo, Olga Maria Oliveira de; Dias, Bruna Borba; Coletti, Giovanni; Lima, Daniel; Silva-Caminha, Silane A.F. da; Polck, Márcia Reis; Martins, Maria Virgínia Alves; Jaramillo, Carlos; Kütter, Vinícius Tavares; Lopes, Ricardo Tadeu

doi:10.1016/j.sedgeo.2020.105739

Cited by 15 publications

(11 citation statements)

References 88 publications

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“…Several remarkable similarities can be observed by comparing our results for the Southwestern and Western Central Asia with the other few available reviews of carbonate production: the peak in LBF abundance during the Eocene and the increase in coral abundance during the Oligocene (Kiessling et a., 1999;Nebelsick et al, 2005;Johnson et al, 2008;Scheibner and Speijer, 2008;Pomar et al, 2017;Aguilera et al, 2020). These changes are likely to have been strongly related to temperature, as the global increase in both CC diversity and importance as carbonate producers, is paired with a decrease in temperatures, while the Eocene widespread abundance of LBF is heralded by high global temperatures (Zachos et a., 2001).…”

Section: Regional and Global Implicationssupporting

confidence: 77%

“…Other reviews of carbonate production in the Eurasian province during the Cenozoic also highlighted a remarkable abundance of LBF during the Paleocene, Eocene (where they dominates), Oligocene and early Miocene (Geel, 2000;Nebelsick et al, 2005;Scheibner and Speijer, 2008;Pomar et al, 2017;Boudagher-Fadel, 2018;Cornacchia et al, 2021). A similar pattern can be also observed in the American province (Aguilera et al, 2020).…”

Section: Carbonate Factories Evolutionmentioning

confidence: 55%

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Paleocene to Miocene southern Tethyan carbonate factories of the Southwestern and Western Central Asia

Coletti¹,

Commissario²,

Mariani³

et al. 2022

Preprint

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One hundred and forty-four sections of shallow-water carbonates, deposited between the Paleocene and the Miocene, from the Levant to the Himalaya, have been investigated to analyze the distribution of carbonate facies and carbonate producing organisms. Large benthic foraminifera resulted the volumetrically most important group of carbonate producers during the whole period, with a peak in abundance during the Eocene. Colonial corals are relatively abundant during the Paleocene and in the Miocene, their abundance peak during the Oligocene and has a minimum during the Eocene. Red calcareous algae have a similar pattern although their peak in abundance covers both the Oligocene and the Miocene. Green calcareous algae decrease from the Paleocene onward. Facies related to very shallow and/or restricted marine conditions peak during the Miocene and in particular during the Aquitanian. Both the pattern of large benthic foraminifera and of colonial corals seems to be related to temperatures, with warm periods favoring the former and cool periods the latter. Red calcareous algae display a pattern similar to that of colonial corals suggesting that the periods favorable for one group, on the large scale, are also favorable for the other. The progressive decrease of green calcareous algae could be tentatively related to a preservation bias connected to the transition from Paleogene assemblages that included presumably calcitic taxa of green algae and Neogene assemblages entirely constituted by aragonitic taxa with limited preservation potential. The Aquitanian peak in facies related to very shallow and/or restricted marine conditions is most likely connected to the progressive narrowing of the Tethys related to the collision between Arabia and Eurasia. These results denote an overall agreement between the abundance of the various types of shallow-water carbonate facies and large-scale environmental and geological processes, highlighting the potential for paleoenvironmental reconstruction locked in the shallow-water record.

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Section: Regional and Global Implicationssupporting

confidence: 77%

Section: Carbonate Factories Evolutionmentioning

confidence: 55%

Paleocene to Miocene southern Tethyan carbonate factories of the Southwestern and Western Central Asia

Coletti¹,

Commissario²,

Mariani³

et al. 2022

Preprint

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“…The Pirabas Formation (Maury, 1925), which is of early Miocene, Aquitanian to early Burdigalian, N4 to N5 to middle Miocene, Langhian N8-N9 plankton foraminiferal biozones (Blow, 1969) (Aguilera et al, 2020a, b and references therein), consists of carbonate to mixed siliciclastic-carbonate deposits associated to shallow-water coastal settings (grainstone and consolidated packstone, stratified wackestone to packstone, and laminated mudstone) (Rossetti et al, 2013 and references therein). In addition, littoral facies (shoreface/foreshore), marginal lagoons, restricted platform environments (gray to olive mudstone and conglomeratic sandstone), and mangrove estuarine lagoons (dark mudstone, massive or laminated) have been recorded (Lima et al, 2020a, b).…”

Section: Geological Settingmentioning

confidence: 99%

“…In addition, littoral facies (shoreface/foreshore), marginal lagoons, restricted platform environments (gray to olive mudstone and conglomeratic sandstone), and mangrove estuarine lagoons (dark mudstone, massive or laminated) have been recorded (Lima et al, 2020a, b). A diverse fossil fauna that is rich in microfossils (foraminifera, ostracodes) and macrofossils (mollusks, bryozoans, corals, echinoderms, decapods, fishes, cetaceans, and sirenids has been described (Aguilera et al, 2020a, b; Lima et al, 2020a, b). The specimen of Willinachoides santanai n. gen. n. sp.…”

Section: Geological Settingmentioning

confidence: 99%

The Inachoididae spider crabs (Crustacea, Brachyura) from the Neogene of the tropical Americas

2021

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The spider crabs Willinachoides santanai n. gen. n. sp. from the early-middle Miocene of north Brazil and Paradasygyius rodriguezi n. sp. from the late Miocene of Venezuela are described and illustrated. Additionally, Eoinachoides senni Van Straelen, 1933, from the late Oligocene–early Miocene of Venezuela, is redescribed based on photographs of the holotype, and the diagnosis of Eoinachoides latispinosus Carriol, Muizon, and Secretan, 1987, from the late Miocene of Peru, is emended also on the basis of photographs of the holotype. The past distribution points to a Tethyan background for the current amphi-American Inachoididae, with the oldest fossil species known from the early Eocene Tethyan regions (Pakistan and Italy), and from the late Eocene–late Pliocene of the Americas. The high number of monotypic genera in Inachoididae could be the result of rapid dispersion followed by diversification during the Neogene of the tropical America, facilitated by global and regional events (e.g., eustatic sea level changes, the Mi-1 Oligocene-Miocene boundary global cooling, the global warming period of the Middle Miocene Climate maximum, closure of the Panama Isthmus, and marine incursions into the Amazon Basin). The shoaling and final closure of the Central American Seaway are thought to have critically affected the evolution of the inachoidids and shaped their current distribution patterns. UUID: http://zoobank.org/6275fdc4-4bfa-4873-9320-3143d4915172.

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“…The Neogene bryozoan fauna associated with shallowwater paleoenvironments from the Gulf of Mexico and the Caribbean Basin is relatively well studied (Cheetham et al, 1999;Di Martino et al, 2018). In other tropical regions from South America, such northern Brazil, studies are incipient and knowledge of early Miocene bryozoans is partial (Zágoršek et al, 2014;Ramalho et al, 2015Ramalho et al, , 2019Aguilera et al, 2020). However, compared to these faunas, in which erect and free-living species are dominant (Cheetham and Jackson, 1996;Ramalho et al, 2015Ramalho et al, , 2019Di Martino et al, 2018), the Siamaná bryozoan assemblage shows a different ecological pattern and taxonomic composition at the genus level.…”

Section: Discussionmentioning

confidence: 99%

Early Miocene coral reef-associated bryozoans from Colombia. Part II: “Ascophora” Cheilostomatida

2021

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Bryozoans are common and diverse in fossil and modern coral reefs. However, studies of bryozoans in ancient reefs are generally limited, and even less is known about fossil bryozoan faunas associated with coral reefs in the Caribbean region. This is the second contribution describing the bryozoan assemblage from the early Miocene (Aquitanian) reefs of the Siamaná Formation in the La Guajira Peninsula, southern Caribbean. Here, we describe and illustrate 17 species of ascophoran-grade cheilostomes, including one new genus and three new species, Ditaxiporina colombiana n. sp., Poricella paulae n. sp., and Cycloavicularia parva n. gen. n. sp. Of the remaining fourteen taxa left in open nomenclature, one is considered confer and three affinis to species previously described, one is identified at family level, and nine at genus level. The Siamaná bryozoan fauna differs in species and colony-form composition from those associated with other paleoenvironments from Oligocene and Miocene localities of North America, the Caribbean, and Brazil. UUID: http://zoobank.org/043eadcf-0e39-4c1b-b207-f7628d6b5c84

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Miocene heterozoan carbonate systems from the western Atlantic equatorial margin in South America: The Pirabas formation

Cited by 15 publications

References 88 publications

Paleocene to Miocene southern Tethyan carbonate factories of the Southwestern and Western Central Asia

Paleocene to Miocene southern Tethyan carbonate factories of the Southwestern and Western Central Asia

The Inachoididae spider crabs (Crustacea, Brachyura) from the Neogene of the tropical Americas

Early Miocene coral reef-associated bryozoans from Colombia. Part II: “Ascophora” Cheilostomatida

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