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dc.contributor.author
García, Victoria Josefina
dc.contributor.author
Rubinstein, Claudia Viviana
dc.contributor.author
Martinez, Marcelo Adrian
dc.date.available
2018-09-12T17:34:01Z
dc.date.issued
2016-06
dc.identifier.citation
García, Victoria Josefina; Rubinstein, Claudia Viviana; Martinez, Marcelo Adrian; Palynology and palynofacies analysis of a Silurian (Llandovery-Wenlock) marine succession from the Precordillera of western Argentina: Palaeobiogeographical and palaeoenvironmental significance; Elsevier Science; Marine Micropaleontology; 126; 6-2016; 50-64
dc.identifier.issn
0377-8398
dc.identifier.uri
http://hdl.handle.net/11336/59336
dc.description.abstract
A comprehensive survey of the marine and terrestrial palynomorphs from the La Chilca Formation, exposed in the Central Precordillera of San Juan, Argentina, is presented. Twenty-four samples from the Quebrada Ancha section were analysed. Marine phytoplankton predominated in the entire stratigraphic unit while the contribution of terrestrial palynomorphs was much less. Acritarchs and chlorophytes represent a highly diversified assemblage, including stratigraphically relevant taxa such as Domasia trispinosa, Tylotopalla caelamenicutis, Tylotopalla digitifera, Crassiangulina variacornuta, Stellinium rabians and Percultisphaera cf. stiphrospinata. Terrestrial palynomorphs are exclusively represented by six cryptospore species; namely Gneudnaspora divellomedia, Pseudodyadospora laevigata, Rugosphaera cerebra, Tetrahedraletes medinensis, cf. Imperfectotriletes vavdovae and Velatitetras retimembrana.Comparisons with coeval phytoplankton assemblages from Gondwana and other palaeoplates such as Laurentia, Baltica and Avalonia show strong similarities, suggesting a cosmopolitan distribution pattern during the Llandovery and Wenlock. The first palynofacies analysis for the early Silurian of Argentina was performed. Depositional environments based on palynofacies match with those previously suggested based on sedimentological data. Two main palynofacies associations are recognised. Association B occurs in the lower part of the La Chilca Formation and is mostly composed of amorphous organic matter (AOM) representative of low energy inner shelf environments. Association A is recognised in the upper part of the formation, where sandstone beds become more frequent, and is characterised by a greater amount of possible palynomorph remains (PPR), indicating a proximal platform to shoreface environment. Three excursions of Total Organic Carbon (TOC) were identified in the section, probably as a result of sea level rise episodes that produced anoxic conditions and preservation of organic matter.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cryptospores
dc.subject
Llandovery-Wenlock
dc.subject
Organic Walled-Phytoplankton
dc.subject
Palaeobiogeography
dc.subject
Palaeoenvironment
dc.subject
Palynofacies
dc.subject.classification
Meteorología y Ciencias Atmosféricas
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Palynology and palynofacies analysis of a Silurian (Llandovery-Wenlock) marine succession from the Precordillera of western Argentina: Palaeobiogeographical and palaeoenvironmental significance
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-04T16:53:06Z
dc.journal.volume
126
dc.journal.pagination
50-64
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: García, Victoria Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Rubinstein, Claudia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Martinez, Marcelo Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
dc.journal.title
Marine Micropaleontology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1016/j.marmicro.2016.06.002
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0377839816300470


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