Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina

The palynological analysis of the 2548-3628 m interval of the San Antonio x-1 Borehole in northwestern Argentina is presented. The illustrated palynoflora is composed of 96 species represented by diverse palynological groups such as trilete spores and cryptospores (46 species), microplankton (39 spe...

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Detalles Bibliográficos
Autores principales:	Noetinger, S., di Pasquo, M.M.
Formato:	JOUR
Materias:	Devonian Los Monos Formation Northwestern Argentina Palynofloras Tarija Basin borehole flora Gondwana microplankton new species palynology relative abundance spore taxonomy Argentina Chitinozoa Grandispora Grandispora douglastownense Protea Verrucosisporites
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_16956133_v9_n2_p199_Noetinger
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_16956133_v9_n2_p199_Noetinger
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spelling	todo:paper_16956133_v9_n2_p199_Noetinger2023-10-03T16:30:05Z Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina Noetinger, S. di Pasquo, M.M. Devonian Los Monos Formation Northwestern Argentina Palynofloras Tarija Basin borehole Devonian flora Gondwana microplankton new species palynology relative abundance spore taxonomy Argentina Tarija Basin Chitinozoa Grandispora Grandispora douglastownense Protea Verrucosisporites The palynological analysis of the 2548-3628 m interval of the San Antonio x-1 Borehole in northwestern Argentina is presented. The illustrated palynoflora is composed of 96 species represented by diverse palynological groups such as trilete spores and cryptospores (46 species), microplankton (39 species), chitinozoans (7 species), scolecodonts, and some remaining specimens in open nomenclature and as incertae sedis. One new species, Retusotriletes ottonei, is described. Thirty-four species are first records in the Argentinean Devonian. Three assemblages (SA1, SA2, and SA3) are defined based on the presence, absence, or abundance of groups of taxa. The presence of Grandispora protea and Grandispora douglastownense among others in the assemblage SA1 is indicative of a late Emsian to mid-Eifelian age. The concurrence of Acinosporites macrospinosus and A. acanthomammillatus in the assemblage SA2 is indicative of a late Eifelian-mid Givetian and is also supported by the appearance of several other species such as Chomotriletes vedugensis, Dibolisporites farraginis and Biharisporites parviornatus. An early Frasnian age is associated to the assemblage SA3 on the basis of the appearances of Lunulidia micropunctata, Pseudolunulidia laevigata, Verrucosisporites bulliferus and the abundance of Maranhites. The assemblages SA1 and SA2 reflect a nearshore, shallow marine depositional conditions, characterized by a high terrestrial input and variable marine influence, while the assemblage SA3 could represent a transgression during that time. The assemblages are composed of many cosmpolitan index species that support a partial correlation with Brazilian and Euramerican zonations resulting from the effects of paleolatitude and the configuration of land and sea for that time, with a narrow Rheic Ocean between northern Gondwana and Euramerica. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_16956133_v9_n2_p199_Noetinger
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Devonian Los Monos Formation Northwestern Argentina Palynofloras Tarija Basin borehole Devonian flora Gondwana microplankton new species palynology relative abundance spore taxonomy Argentina Tarija Basin Chitinozoa Grandispora Grandispora douglastownense Protea Verrucosisporites
spellingShingle	Devonian Los Monos Formation Northwestern Argentina Palynofloras Tarija Basin borehole Devonian flora Gondwana microplankton new species palynology relative abundance spore taxonomy Argentina Tarija Basin Chitinozoa Grandispora Grandispora douglastownense Protea Verrucosisporites Noetinger, S. di Pasquo, M.M. Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina
topic_facet	Devonian Los Monos Formation Northwestern Argentina Palynofloras Tarija Basin borehole Devonian flora Gondwana microplankton new species palynology relative abundance spore taxonomy Argentina Tarija Basin Chitinozoa Grandispora Grandispora douglastownense Protea Verrucosisporites
description	The palynological analysis of the 2548-3628 m interval of the San Antonio x-1 Borehole in northwestern Argentina is presented. The illustrated palynoflora is composed of 96 species represented by diverse palynological groups such as trilete spores and cryptospores (46 species), microplankton (39 species), chitinozoans (7 species), scolecodonts, and some remaining specimens in open nomenclature and as incertae sedis. One new species, Retusotriletes ottonei, is described. Thirty-four species are first records in the Argentinean Devonian. Three assemblages (SA1, SA2, and SA3) are defined based on the presence, absence, or abundance of groups of taxa. The presence of Grandispora protea and Grandispora douglastownense among others in the assemblage SA1 is indicative of a late Emsian to mid-Eifelian age. The concurrence of Acinosporites macrospinosus and A. acanthomammillatus in the assemblage SA2 is indicative of a late Eifelian-mid Givetian and is also supported by the appearance of several other species such as Chomotriletes vedugensis, Dibolisporites farraginis and Biharisporites parviornatus. An early Frasnian age is associated to the assemblage SA3 on the basis of the appearances of Lunulidia micropunctata, Pseudolunulidia laevigata, Verrucosisporites bulliferus and the abundance of Maranhites. The assemblages SA1 and SA2 reflect a nearshore, shallow marine depositional conditions, characterized by a high terrestrial input and variable marine influence, while the assemblage SA3 could represent a transgression during that time. The assemblages are composed of many cosmpolitan index species that support a partial correlation with Brazilian and Euramerican zonations resulting from the effects of paleolatitude and the configuration of land and sea for that time, with a narrow Rheic Ocean between northern Gondwana and Euramerica.
format	JOUR
author	Noetinger, S. di Pasquo, M.M.
author_facet	Noetinger, S. di Pasquo, M.M.
author_sort	Noetinger, S.
title	Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina
title_short	Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina
title_full	Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina
title_fullStr	Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina
title_full_unstemmed	Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina
title_sort	devonian palynological assemblages from the san antonio x-1 borehole, tarija basin, northwestern argentina
url	http://hdl.handle.net/20.500.12110/paper_16956133_v9_n2_p199_Noetinger
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Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina

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