The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)

Silurian-Devonian deposits of central western Argentina contain one of the most diverse Palaeozoic records of Nereites in Gondwana. Nereites cf. cambrensis, Nereites irregularis?, Nereites jacksoni, Nereites macleayii, Nereites missouriensis and Nereites pugnus are documented in a turbidite-like suc...

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Detalles Bibliográficos
Autores principales: Pazos, Pablo Jose, Fernandez, Diana Elizabeth, Comerio, Marcos Alejandro
Publicado: 2015
Materias:
Gondwana
MISS
Nereites
Silurian-Devonian
Turbidite-like
Wrinkle marks
Arthropoda
Diplichnites
Pugnus
Zoophycos
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v439_n_p4_Pazos
http://hdl.handle.net/20.500.12110/paper_00310182_v439_n_p4_Pazos
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00310182_v439_n_p4_Pazos
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spelling paper:paper_00310182_v439_n_p4_Pazos2023-06-08T14:56:44Z The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina) Pazos, Pablo Jose Fernandez, Diana Elizabeth Comerio, Marcos Alejandro Gondwana MISS Nereites Silurian-Devonian Turbidite-like Wrinkle marks Arthropoda Diplichnites Nereites Pugnus Zoophycos Silurian-Devonian deposits of central western Argentina contain one of the most diverse Palaeozoic records of Nereites in Gondwana. Nereites cf. cambrensis, Nereites irregularis?, Nereites jacksoni, Nereites macleayii, Nereites missouriensis and Nereites pugnus are documented in a turbidite-like succession of the San Rafael Block (Río Seco de los Castaños Formation). The succession, historically assumed as deep-sea deposits or interpreted as a deltaic system, also contains abundant microbially induced sedimentary structures (MISS) such as wrinkle marks. Glossy surfaces indicate abundant biofilms, where the fossil record comprises N. macleayii, N. missouriensis, scarce arthropod trackways (. Diplichnites?) and undermat-miner structures. Nereites, the pioneer colonizer, is in some cases cross-cut by Dictyodora, while undermat miners are the late bioturbators. The succession is dominated by gravity flow deposits, including storm related, turbidite-like deposits and abundant wrinkle marks. These suggest deposition on the shelf rather than the deep sea. This study shows that microbial mats were not restricted to marginal marine environments during the mid Palaeozoic, and documents one of the most diverse Palaeozoic records of Nereites in western Gondwana. It also contributes to the record of Nereites, Dictyodora, and Zoophycos found, for first time, in association with microbial mat structures in the late Silurian-earliest Devonian, the Nereites ichnofacies together with abundant wrinkle marks. © 2015 Elsevier B.V. Fil:Pazos, P.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fernández, D.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Comerio, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v439_n_p4_Pazos http://hdl.handle.net/20.500.12110/paper_00310182_v439_n_p4_Pazos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Gondwana
MISS
Nereites
Silurian-Devonian
Turbidite-like
Wrinkle marks
Arthropoda
Diplichnites
Nereites
Pugnus
Zoophycos
spellingShingle Gondwana
MISS
Nereites
Silurian-Devonian
Turbidite-like
Wrinkle marks
Arthropoda
Diplichnites
Nereites
Pugnus
Zoophycos
Pazos, Pablo Jose
Fernandez, Diana Elizabeth
Comerio, Marcos Alejandro
The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)
topic_facet Gondwana
MISS
Nereites
Silurian-Devonian
Turbidite-like
Wrinkle marks
Arthropoda
Diplichnites
Nereites
Pugnus
Zoophycos
description Silurian-Devonian deposits of central western Argentina contain one of the most diverse Palaeozoic records of Nereites in Gondwana. Nereites cf. cambrensis, Nereites irregularis?, Nereites jacksoni, Nereites macleayii, Nereites missouriensis and Nereites pugnus are documented in a turbidite-like succession of the San Rafael Block (Río Seco de los Castaños Formation). The succession, historically assumed as deep-sea deposits or interpreted as a deltaic system, also contains abundant microbially induced sedimentary structures (MISS) such as wrinkle marks. Glossy surfaces indicate abundant biofilms, where the fossil record comprises N. macleayii, N. missouriensis, scarce arthropod trackways (. Diplichnites?) and undermat-miner structures. Nereites, the pioneer colonizer, is in some cases cross-cut by Dictyodora, while undermat miners are the late bioturbators. The succession is dominated by gravity flow deposits, including storm related, turbidite-like deposits and abundant wrinkle marks. These suggest deposition on the shelf rather than the deep sea. This study shows that microbial mats were not restricted to marginal marine environments during the mid Palaeozoic, and documents one of the most diverse Palaeozoic records of Nereites in western Gondwana. It also contributes to the record of Nereites, Dictyodora, and Zoophycos found, for first time, in association with microbial mat structures in the late Silurian-earliest Devonian, the Nereites ichnofacies together with abundant wrinkle marks. © 2015 Elsevier B.V.
author Pazos, Pablo Jose
Fernandez, Diana Elizabeth
Comerio, Marcos Alejandro
author_facet Pazos, Pablo Jose
Fernandez, Diana Elizabeth
Comerio, Marcos Alejandro
author_sort Pazos, Pablo Jose
title The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)
title_short The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)
title_full The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)
title_fullStr The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)
title_full_unstemmed The unusual record of Nereites, wrinkle marks and undermat mining trace fossils from the late Silurian-earliest Devonian of central-western margin of Gondwana (Argentina)
title_sort unusual record of nereites, wrinkle marks and undermat mining trace fossils from the late silurian-earliest devonian of central-western margin of gondwana (argentina)
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v439_n_p4_Pazos
http://hdl.handle.net/20.500.12110/paper_00310182_v439_n_p4_Pazos
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