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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Autores principales: Pazos, P.J., Gutiérrez, C., Fernández, D.E., Heredia, A.M., Comerio, M.
Formato: JOUR
Materias:
Gondwana
MISS
Nereites
Silurian-Devonian
Turbidite-like
Wrinkle marks
Arthropoda
Diplichnites
Pugnus
Zoophycos
Acceso en línea: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 todo:paper_00310182_v439_n_p4_Pazos
record_format dspace
spelling todo:paper_00310182_v439_n_p4_Pazos2023-10-03T14:41:00Z 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, P.J. Gutiérrez, C. Fernández, D.E. Heredia, A.M. Comerio, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, P.J.
Gutiérrez, C.
Fernández, D.E.
Heredia, A.M.
Comerio, M.
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.
format JOUR
author Pazos, P.J.
Gutiérrez, C.
Fernández, D.E.
Heredia, A.M.
Comerio, M.
author_facet Pazos, P.J.
Gutiérrez, C.
Fernández, D.E.
Heredia, A.M.
Comerio, M.
author_sort Pazos, P.J.
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)
url http://hdl.handle.net/20.500.12110/paper_00310182_v439_n_p4_Pazos
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