Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.sedgeo.2019.06.003 http://hdl.handle.net/11449/186069 |
Resumo: | The Aptian Romualdo Formation is a siliciclastic-dominated sedimentary unit recording the last marine ingression within the Cretaceous interior basins of northeastern Brazil. At the western margin of the Araripe Basin, rocks of the Romualdo Formation are mainly represented by carbonates resting abruptly over the Proterozoic crystalline basement. Detailed mapping and stratigraphic analysis revealed two stromatolite fields that were described and discussed for the first time. Several bioherms, biostromes and isolated stromatolites characterized by distinct microbialite morphologies associated with echinoid-rich strata have been identified, suggesting that hypersalinity, water depth and hydraulic conditions were the main factors controlling stromatolite morphogenesis. A cm-thick amalgamated bivalve rudstone, resting directly on the basement and representing a shell concentration formed above the fair-weather wave base was also recorded. Based on the regional distribution of the stromatolite types and associated sedimentary fades, we interpret the depositional environment as a local low gradient carbonate ramp deepening to the east. Our data robustly indicated that the western rocky shorelines of the Araripe Basin during the Aptian were populated by microbial mats and stromatolites in a condition analogous to the modern world-famous Hamelin Pool, Shark Bay, Western Australia. Finally, the development of stromatolites and echinoid-bearing microbialites at the western margin of the basin may be correlated with the formation of bakevelliid- and cassiopid-rich shell beds in the upper part of the Romualdo Formation at the eastern margin. (C) 2019 Elsevier B.V. All rights reserved. |
id |
UNSP_6bf3303bf04408067270f01bd7993638 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/186069 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil)StromatolitesMicrobialitesEchinoidsBivalvesShark Bay analogueLower CretaceousThe Aptian Romualdo Formation is a siliciclastic-dominated sedimentary unit recording the last marine ingression within the Cretaceous interior basins of northeastern Brazil. At the western margin of the Araripe Basin, rocks of the Romualdo Formation are mainly represented by carbonates resting abruptly over the Proterozoic crystalline basement. Detailed mapping and stratigraphic analysis revealed two stromatolite fields that were described and discussed for the first time. Several bioherms, biostromes and isolated stromatolites characterized by distinct microbialite morphologies associated with echinoid-rich strata have been identified, suggesting that hypersalinity, water depth and hydraulic conditions were the main factors controlling stromatolite morphogenesis. A cm-thick amalgamated bivalve rudstone, resting directly on the basement and representing a shell concentration formed above the fair-weather wave base was also recorded. Based on the regional distribution of the stromatolite types and associated sedimentary fades, we interpret the depositional environment as a local low gradient carbonate ramp deepening to the east. Our data robustly indicated that the western rocky shorelines of the Araripe Basin during the Aptian were populated by microbial mats and stromatolites in a condition analogous to the modern world-famous Hamelin Pool, Shark Bay, Western Australia. Finally, the development of stromatolites and echinoid-bearing microbialites at the western margin of the basin may be correlated with the formation of bakevelliid- and cassiopid-rich shell beds in the upper part of the Romualdo Formation at the eastern margin. (C) 2019 Elsevier B.V. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)PetrobrasConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24A,1515, BR-12506900 Rio Claro, BrazilFriedrich Alexander Univ Erlangen Nurnberg, FG Palaoumwelt, GeoZentrum Nordbayern, Loewenichstr 28, D-91054 Erlangen, GermanyUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618000 Botucatu, SP, BrazilUniv Reg Cariri, Dept Ciencias Biol, Campus Pimenta 1161, BR-63100000 Crato, BrazilUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24A,1515, BR-12506900 Rio Claro, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618000 Botucatu, SP, BrazilFAPESP: 2016/13214-7FAPESP: 2017/20803-1FAPESP: 18/01750-7Petrobras: 2014/00519-9CNPq: 444070/2013-1CNPq: 401039/2013-5CNPq: 1082 30017/2015-3CNPq: 152385/2016-9CNPq: 301294/2018-6Elsevier B.V.Universidade Estadual Paulista (Unesp)Friedrich Alexander Univ Erlangen NurnbergUniv Reg CaririVarejao, F. G. [UNESP]Fuersich, F. T.Warren, L. [UNESP]Matos, S. A. [UNESP]Rodrigues, M. G. [UNESP]Assine, M. L. [UNESP]Sales, A. M. F.Simoes, M. G. [UNESP]2019-10-04T12:40:55Z2019-10-04T12:40:55Z2019-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article103-120http://dx.doi.org/10.1016/j.sedgeo.2019.06.003Sedimentary Geology. Amsterdam: Elsevier, v. 389, p. 103-120, 2019.0037-0738http://hdl.handle.net/11449/18606910.1016/j.sedgeo.2019.06.003WOS:000482506400008Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSedimentary Geologyinfo:eu-repo/semantics/openAccess2021-10-23T15:55:06Zoai:repositorio.unesp.br:11449/186069Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:50:11.317313Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
title |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
spellingShingle |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) Varejao, F. G. [UNESP] Stromatolites Microbialites Echinoids Bivalves Shark Bay analogue Lower Cretaceous |
title_short |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
title_full |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
title_fullStr |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
title_full_unstemmed |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
title_sort |
Microbialite fields developed in a protected rocky coastline: The shallow carbonate ramp of the Aptian Romualdo Formation (Araripe Basin, NE Brazil) |
author |
Varejao, F. G. [UNESP] |
author_facet |
Varejao, F. G. [UNESP] Fuersich, F. T. Warren, L. [UNESP] Matos, S. A. [UNESP] Rodrigues, M. G. [UNESP] Assine, M. L. [UNESP] Sales, A. M. F. Simoes, M. G. [UNESP] |
author_role |
author |
author2 |
Fuersich, F. T. Warren, L. [UNESP] Matos, S. A. [UNESP] Rodrigues, M. G. [UNESP] Assine, M. L. [UNESP] Sales, A. M. F. Simoes, M. G. [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Friedrich Alexander Univ Erlangen Nurnberg Univ Reg Cariri |
dc.contributor.author.fl_str_mv |
Varejao, F. G. [UNESP] Fuersich, F. T. Warren, L. [UNESP] Matos, S. A. [UNESP] Rodrigues, M. G. [UNESP] Assine, M. L. [UNESP] Sales, A. M. F. Simoes, M. G. [UNESP] |
dc.subject.por.fl_str_mv |
Stromatolites Microbialites Echinoids Bivalves Shark Bay analogue Lower Cretaceous |
topic |
Stromatolites Microbialites Echinoids Bivalves Shark Bay analogue Lower Cretaceous |
description |
The Aptian Romualdo Formation is a siliciclastic-dominated sedimentary unit recording the last marine ingression within the Cretaceous interior basins of northeastern Brazil. At the western margin of the Araripe Basin, rocks of the Romualdo Formation are mainly represented by carbonates resting abruptly over the Proterozoic crystalline basement. Detailed mapping and stratigraphic analysis revealed two stromatolite fields that were described and discussed for the first time. Several bioherms, biostromes and isolated stromatolites characterized by distinct microbialite morphologies associated with echinoid-rich strata have been identified, suggesting that hypersalinity, water depth and hydraulic conditions were the main factors controlling stromatolite morphogenesis. A cm-thick amalgamated bivalve rudstone, resting directly on the basement and representing a shell concentration formed above the fair-weather wave base was also recorded. Based on the regional distribution of the stromatolite types and associated sedimentary fades, we interpret the depositional environment as a local low gradient carbonate ramp deepening to the east. Our data robustly indicated that the western rocky shorelines of the Araripe Basin during the Aptian were populated by microbial mats and stromatolites in a condition analogous to the modern world-famous Hamelin Pool, Shark Bay, Western Australia. Finally, the development of stromatolites and echinoid-bearing microbialites at the western margin of the basin may be correlated with the formation of bakevelliid- and cassiopid-rich shell beds in the upper part of the Romualdo Formation at the eastern margin. (C) 2019 Elsevier B.V. All rights reserved. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-04T12:40:55Z 2019-10-04T12:40:55Z 2019-07-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.sedgeo.2019.06.003 Sedimentary Geology. Amsterdam: Elsevier, v. 389, p. 103-120, 2019. 0037-0738 http://hdl.handle.net/11449/186069 10.1016/j.sedgeo.2019.06.003 WOS:000482506400008 |
url |
http://dx.doi.org/10.1016/j.sedgeo.2019.06.003 http://hdl.handle.net/11449/186069 |
identifier_str_mv |
Sedimentary Geology. Amsterdam: Elsevier, v. 389, p. 103-120, 2019. 0037-0738 10.1016/j.sedgeo.2019.06.003 WOS:000482506400008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Sedimentary Geology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
103-120 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128988369911808 |