Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record
<p>Standard Early Jurassic biostratigraphic studies were performed in the boreal and Tethys realms (western Europe and northern Africa), and biozonations from these areas are the most accurate of the world. Comparatively, investigations in the Pacific realm are scarce, and, in Argentina, they...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-04-01
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| Series: | Journal of Micropalaeontology |
| Online Access: | https://jm.copernicus.org/articles/41/75/2022/jm-41-75-2022.pdf |
| _version_ | 1828848038019334144 |
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| author | M. Chaumeil Rodríguez M. Chaumeil Rodríguez E. Mattioli E. Mattioli J. P. Pérez Panera |
| author_facet | M. Chaumeil Rodríguez M. Chaumeil Rodríguez E. Mattioli E. Mattioli J. P. Pérez Panera |
| author_sort | M. Chaumeil Rodríguez |
| collection | DOAJ |
| description | <p>Standard Early Jurassic biostratigraphic studies were
performed in the boreal and Tethys realms (western Europe and northern
Africa), and biozonations from these areas are the most accurate of the
world. Comparatively, investigations in the Pacific realm are scarce, and, in
Argentina, they are limited to contributions based on oil-industry
subsurface and outcrop reports for the Los Molles Formation. A focused
systematic analysis was not previously addressed in the area. The
Neuquén Basin in west–central Argentina offers a unique opportunity to
study the Early Jurassic calcareous nannofossil history in the
south-eastern Pacific Ocean. Calcareous nannofossil assemblages from El
Matuasto I section (Los Molles Formation) represent one of the earliest
records for the Early Jurassic in the Neuquén Basin and one of the few
for the eastern Pacific realm. A detailed systematic analysis allowed the
recognition of major bioevents and a comparison with worldwide associations
and biostratigraphic schemes. A thorough taxonomic discussion of the Early
Jurassic nannofossil species of the Neuquén Basin is presented for the
first time. Herein, the taxonomic features of coccoliths recorded in the
Neuquén Basin are settled. The age of the calcareous nannofossil
assemblages recorded in El Matuasto I is early–late Pliensbachian, covering
the NJT4a to NJT4c subzones. Similarities between the Neuquén Basin and
localities from the proto-Atlantic region suggest an effective connection
between the Pacific and Tethyan basins during the Pliensbachian.</p> |
| first_indexed | 2024-12-12T22:21:59Z |
| format | Article |
| id | doaj.art-34b54d101e59486bb6ebe4ad54269f1e |
| institution | Directory Open Access Journal |
| issn | 0262-821X 2041-4978 |
| language | English |
| last_indexed | 2024-12-12T22:21:59Z |
| publishDate | 2022-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Journal of Micropalaeontology |
| spelling | doaj.art-34b54d101e59486bb6ebe4ad54269f1e2022-12-22T00:09:53ZengCopernicus PublicationsJournal of Micropalaeontology0262-821X2041-49782022-04-01417510510.5194/jm-41-75-2022Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) recordM. Chaumeil Rodríguez0M. Chaumeil Rodríguez1E. Mattioli2E. Mattioli3J. P. Pérez Panera4CONICET – División Científica de Geología, Museo de La Plata, Paseo del Bosque s/n, La Plata, 1900, ArgentinaUniv Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne, 69100, FranceUniv Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne, 69100, FranceIUF, Institut Universitaire de France, Paris, FranceCONICET – División Científica de Geología, Museo de La Plata, Paseo del Bosque s/n, La Plata, 1900, Argentina<p>Standard Early Jurassic biostratigraphic studies were performed in the boreal and Tethys realms (western Europe and northern Africa), and biozonations from these areas are the most accurate of the world. Comparatively, investigations in the Pacific realm are scarce, and, in Argentina, they are limited to contributions based on oil-industry subsurface and outcrop reports for the Los Molles Formation. A focused systematic analysis was not previously addressed in the area. The Neuquén Basin in west–central Argentina offers a unique opportunity to study the Early Jurassic calcareous nannofossil history in the south-eastern Pacific Ocean. Calcareous nannofossil assemblages from El Matuasto I section (Los Molles Formation) represent one of the earliest records for the Early Jurassic in the Neuquén Basin and one of the few for the eastern Pacific realm. A detailed systematic analysis allowed the recognition of major bioevents and a comparison with worldwide associations and biostratigraphic schemes. A thorough taxonomic discussion of the Early Jurassic nannofossil species of the Neuquén Basin is presented for the first time. Herein, the taxonomic features of coccoliths recorded in the Neuquén Basin are settled. The age of the calcareous nannofossil assemblages recorded in El Matuasto I is early–late Pliensbachian, covering the NJT4a to NJT4c subzones. Similarities between the Neuquén Basin and localities from the proto-Atlantic region suggest an effective connection between the Pacific and Tethyan basins during the Pliensbachian.</p>https://jm.copernicus.org/articles/41/75/2022/jm-41-75-2022.pdf |
| spellingShingle | M. Chaumeil Rodríguez M. Chaumeil Rodríguez E. Mattioli E. Mattioli J. P. Pérez Panera Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record Journal of Micropalaeontology |
| title | Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record |
| title_full | Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record |
| title_fullStr | Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record |
| title_full_unstemmed | Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record |
| title_short | Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record |
| title_sort | lower jurassic calcareous nannofossil taxonomy revisited according to the neuquen basin argentina record |
| url | https://jm.copernicus.org/articles/41/75/2022/jm-41-75-2022.pdf |
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