Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina

The Late Jurassic – Early Cretaceous marine sediments of the Andean region show an excellent record of different calcareous microfossils, among which calcareous dinoflagellate cysts stand out. Detailed micropaleontological studies of Vaca Muerta Formation (Early Tithonian – Early Valanginian) in the...

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Autores principales: Ivanova, D.K., Kietzmann, D.A.
Formato: JOUR
Materias:
Calcareous dinoflagellate cysts: biostratigraphy
Lower cretaceous
Upper jurassic
Vaca Muerta Formation
biostratigraphy
Cretaceous
dinoflagellate cyst
Jurassic
microfossil
micropaleontology
Tithonian
Valanginian
Argentina
Mendoza
Neuquen Basin
Dinophyceae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v77_n_p150_Ivanova
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08959811_v77_n_p150_Ivanova2023-10-03T15:43:29Z Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina Ivanova, D.K. Kietzmann, D.A. Calcareous dinoflagellate cysts: biostratigraphy Lower cretaceous Upper jurassic Vaca Muerta Formation biostratigraphy Cretaceous dinoflagellate cyst Jurassic microfossil micropaleontology Tithonian Valanginian Argentina Mendoza Neuquen Basin Dinophyceae The Late Jurassic – Early Cretaceous marine sediments of the Andean region show an excellent record of different calcareous microfossils, among which calcareous dinoflagellate cysts stand out. Detailed micropaleontological studies of Vaca Muerta Formation (Early Tithonian – Early Valanginian) in the southern Mendoza Neuquén Basin from three sections are conducted with the aim of establishing a major presence of microfossil representatives from different microfossil groups. The analysis of several thin sections from the outcrops reveals a relatively rich micropaleontological assemblage of calcareous dinoflagellate cysts, as well as levels with poor preserved calpionellids and benthic foraminifera. Particularly, calcareous dinoflagellate cyst includes 24 known species (two of them with two subspecies). Some species with biostratigraphic value of the Tethyan region have been identified also in the Andean region: 1) Committosphaera pulla (Borza) and Parastomiosphaera malmica (Borza) are species known only from Lower Tithonian; 2) Colomisphaera tenuis (Nagy) appears in the latest Early Tithonian; 3) Colomisphaera fortis Řehánek and Stomiosphaerina proxima Řehánek are important markers for the latest Late Tithonian – middle Late Berriasian interval; 4) Stomiosphaera wanneri Borza appears in the middle Late Berriasian; 5) Colomisphaera conferta Řehánek and Colomisphaera vogleri (Borza) appear in the Late Berriasian and marked the Berriasian-Valanginian boundary interval; 6) Carpistomiosphaera valanginiana Borza is a marker for the Lower/Upper Valanginian. More detailed studies of these groups will allow their correlation with Tethyan biozones, and contribute to improve biostratigraphic schemes in the Neuquén Basin. © 2017 Elsevier Ltd Fil:Kietzmann, D.A. 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_08959811_v77_n_p150_Ivanova
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Calcareous dinoflagellate cysts: biostratigraphy
Lower cretaceous
Upper jurassic
Vaca Muerta Formation
biostratigraphy
Cretaceous
dinoflagellate cyst
Jurassic
microfossil
micropaleontology
Tithonian
Valanginian
Argentina
Mendoza
Neuquen Basin
Dinophyceae
spellingShingle Calcareous dinoflagellate cysts: biostratigraphy
Lower cretaceous
Upper jurassic
Vaca Muerta Formation
biostratigraphy
Cretaceous
dinoflagellate cyst
Jurassic
microfossil
micropaleontology
Tithonian
Valanginian
Argentina
Mendoza
Neuquen Basin
Dinophyceae
Ivanova, D.K.
Kietzmann, D.A.
Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina
topic_facet Calcareous dinoflagellate cysts: biostratigraphy
Lower cretaceous
Upper jurassic
Vaca Muerta Formation
biostratigraphy
Cretaceous
dinoflagellate cyst
Jurassic
microfossil
micropaleontology
Tithonian
Valanginian
Argentina
Mendoza
Neuquen Basin
Dinophyceae
description The Late Jurassic – Early Cretaceous marine sediments of the Andean region show an excellent record of different calcareous microfossils, among which calcareous dinoflagellate cysts stand out. Detailed micropaleontological studies of Vaca Muerta Formation (Early Tithonian – Early Valanginian) in the southern Mendoza Neuquén Basin from three sections are conducted with the aim of establishing a major presence of microfossil representatives from different microfossil groups. The analysis of several thin sections from the outcrops reveals a relatively rich micropaleontological assemblage of calcareous dinoflagellate cysts, as well as levels with poor preserved calpionellids and benthic foraminifera. Particularly, calcareous dinoflagellate cyst includes 24 known species (two of them with two subspecies). Some species with biostratigraphic value of the Tethyan region have been identified also in the Andean region: 1) Committosphaera pulla (Borza) and Parastomiosphaera malmica (Borza) are species known only from Lower Tithonian; 2) Colomisphaera tenuis (Nagy) appears in the latest Early Tithonian; 3) Colomisphaera fortis Řehánek and Stomiosphaerina proxima Řehánek are important markers for the latest Late Tithonian – middle Late Berriasian interval; 4) Stomiosphaera wanneri Borza appears in the middle Late Berriasian; 5) Colomisphaera conferta Řehánek and Colomisphaera vogleri (Borza) appear in the Late Berriasian and marked the Berriasian-Valanginian boundary interval; 6) Carpistomiosphaera valanginiana Borza is a marker for the Lower/Upper Valanginian. More detailed studies of these groups will allow their correlation with Tethyan biozones, and contribute to improve biostratigraphic schemes in the Neuquén Basin. © 2017 Elsevier Ltd
format JOUR
author Ivanova, D.K.
Kietzmann, D.A.
author_facet Ivanova, D.K.
Kietzmann, D.A.
author_sort Ivanova, D.K.
title Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina
title_short Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina
title_full Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina
title_fullStr Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina
title_full_unstemmed Calcareous dinoflagellate cysts from the Tithonian - Valanginian Vaca Muerta Formation in the southern Mendoza area of the Neuquén Basin, Argentina
title_sort calcareous dinoflagellate cysts from the tithonian - valanginian vaca muerta formation in the southern mendoza area of the neuquén basin, argentina
url http://hdl.handle.net/20.500.12110/paper_08959811_v77_n_p150_Ivanova
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AT kietzmannda calcareousdinoflagellatecystsfromthetithonianvalanginianvacamuertaformationinthesouthernmendozaareaoftheneuquenbasinargentina
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