Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance

Late Jurassic-Early Cretaceous nannoconid assemblages are reported from 11 sections in the Neuquén Basin. Six species and 11 subspecies of Nannoconus Kamptner are studied systematically. Among them, Nannoconus kamptneri minor Bralower, Nannoconus kamptneri kamptneri Brönnimann, Nannoconus bucheri Br...

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Detalles Bibliográficos
Autores principales:	Lescano, Marina Aurora, Concheyro, Graciela Andrea
Publicado:	2014
Materias:	Biostratigraphy Calcareous nannofossils Neuquén Basin Vaca Muerta and Agrio Formations biostratigraphy chronostratigraphy fossil assemblage Jurassic-Cretaceous boundary microfossil new record paleobiogeography paleoceanography taxonomy nanofossil paleoecology paleogeography Southern Hemisphere Argentina Neuquen Basin Neuquen Nannoconus Nannoconus ligius Nannoconus quadricanalis
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n6_p466_Lescano http://hdl.handle.net/20.500.12110/paper_00027014_v51_n6_p466_Lescano
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00027014_v51_n6_p466_Lescano
record_format	dspace
spelling	paper:paper_00027014_v51_n6_p466_Lescano2023-06-08T14:22:29Z Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance Lescano, Marina Aurora Concheyro, Graciela Andrea Biostratigraphy Calcareous nannofossils Neuquén Basin Vaca Muerta and Agrio Formations biostratigraphy chronostratigraphy fossil assemblage Jurassic-Cretaceous boundary microfossil new record paleobiogeography paleoceanography taxonomy nanofossil paleoecology paleogeography Southern Hemisphere Argentina Neuquen Basin Neuquen Nannoconus Nannoconus ligius Nannoconus quadricanalis Late Jurassic-Early Cretaceous nannoconid assemblages are reported from 11 sections in the Neuquén Basin. Six species and 11 subspecies of Nannoconus Kamptner are studied systematically. Among them, Nannoconus kamptneri minor Bralower, Nannoconus kamptneri kamptneri Brönnimann, Nannoconus bucheri Brönnimann, Nannoconus circularis Deres and Achéritéguy and Nannoconus ligius Applegate and Bergen are highlighted as markers for the studied interval. Nannoconus elongatus minutus Van Niel, Nannoconus quadriangulus apertus Deflandre y Deflandre-Rigaud, Nannoconus truitti frequens Deres and Achéritéguy, Nannoconus truitti rectangularis Deres and Achéritéguy, Nannoconus truitti truitti Brönnimann are described for the first time in the Neuquén Basin. Nannoconus steinmannii minor Deres and Achéritéguy is reported for the first time in the Southern Hemisphere. The biostratigraphic analysis suggests an ampliation of the stratigraphic ranges of Nannoconus elongatus minutus, Nannoconus quadriangulus quadriangulus Deflandre and Deflandre-Rigaud, Nannoconus quadricanalis Bown and Concheyro, Nannoconus truitti frequens and Nannoconus truitti rectangularis. Changes in the composition and diversity of the recorded nannoconid assemblages suggest variations in the paleobiogeographic and paleoecological conditions that may be helpful in the characterization of the sedimentary environments represented in the Vaca Muerta and Agrio Formations. Fil:Lescano, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Concheyro, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n6_p466_Lescano http://hdl.handle.net/20.500.12110/paper_00027014_v51_n6_p466_Lescano
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Biostratigraphy Calcareous nannofossils Neuquén Basin Vaca Muerta and Agrio Formations biostratigraphy chronostratigraphy fossil assemblage Jurassic-Cretaceous boundary microfossil new record paleobiogeography paleoceanography taxonomy nanofossil paleoecology paleogeography Southern Hemisphere Argentina Neuquen Basin Neuquen Nannoconus Nannoconus ligius Nannoconus quadricanalis
spellingShingle	Biostratigraphy Calcareous nannofossils Neuquén Basin Vaca Muerta and Agrio Formations biostratigraphy chronostratigraphy fossil assemblage Jurassic-Cretaceous boundary microfossil new record paleobiogeography paleoceanography taxonomy nanofossil paleoecology paleogeography Southern Hemisphere Argentina Neuquen Basin Neuquen Nannoconus Nannoconus ligius Nannoconus quadricanalis Lescano, Marina Aurora Concheyro, Graciela Andrea Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance
topic_facet	Biostratigraphy Calcareous nannofossils Neuquén Basin Vaca Muerta and Agrio Formations biostratigraphy chronostratigraphy fossil assemblage Jurassic-Cretaceous boundary microfossil new record paleobiogeography paleoceanography taxonomy nanofossil paleoecology paleogeography Southern Hemisphere Argentina Neuquen Basin Neuquen Nannoconus Nannoconus ligius Nannoconus quadricanalis
description	Late Jurassic-Early Cretaceous nannoconid assemblages are reported from 11 sections in the Neuquén Basin. Six species and 11 subspecies of Nannoconus Kamptner are studied systematically. Among them, Nannoconus kamptneri minor Bralower, Nannoconus kamptneri kamptneri Brönnimann, Nannoconus bucheri Brönnimann, Nannoconus circularis Deres and Achéritéguy and Nannoconus ligius Applegate and Bergen are highlighted as markers for the studied interval. Nannoconus elongatus minutus Van Niel, Nannoconus quadriangulus apertus Deflandre y Deflandre-Rigaud, Nannoconus truitti frequens Deres and Achéritéguy, Nannoconus truitti rectangularis Deres and Achéritéguy, Nannoconus truitti truitti Brönnimann are described for the first time in the Neuquén Basin. Nannoconus steinmannii minor Deres and Achéritéguy is reported for the first time in the Southern Hemisphere. The biostratigraphic analysis suggests an ampliation of the stratigraphic ranges of Nannoconus elongatus minutus, Nannoconus quadriangulus quadriangulus Deflandre and Deflandre-Rigaud, Nannoconus quadricanalis Bown and Concheyro, Nannoconus truitti frequens and Nannoconus truitti rectangularis. Changes in the composition and diversity of the recorded nannoconid assemblages suggest variations in the paleobiogeographic and paleoecological conditions that may be helpful in the characterization of the sedimentary environments represented in the Vaca Muerta and Agrio Formations.
author	Lescano, Marina Aurora Concheyro, Graciela Andrea
author_facet	Lescano, Marina Aurora Concheyro, Graciela Andrea
author_sort	Lescano, Marina Aurora
title	Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance
title_short	Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance
title_full	Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance
title_fullStr	Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance
title_full_unstemmed	Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance
title_sort	nannoconids of the mendoza group (lower cretaceous) neuquen province, republica argentina: taxonomy, cronostratigraphy and paleogeographic significance
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n6_p466_Lescano http://hdl.handle.net/20.500.12110/paper_00027014_v51_n6_p466_Lescano
work_keys_str_mv	AT lescanomarinaaurora nannoconidsofthemendozagrouplowercretaceousneuquenprovincerepublicaargentinataxonomycronostratigraphyandpaleogeographicsignificance AT concheyrogracielaandrea nannoconidsofthemendozagrouplowercretaceousneuquenprovincerepublicaargentinataxonomycronostratigraphyandpaleogeographicsignificance
_version_	1768545579124654080

Nannoconids of the Mendoza Group (Lower cretaceous) Neuquen Province, Republica Argentina: Taxonomy, cronostratigraphy and paleogeographic significance

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