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First record of megafloras and palynology in the Tarija Formation (Pennsylvanian), Aguas Blancas creek, Salta Province, Argentina. Description of two new species.

dc.contributoren-US
dc.contributores-ES
dc.creatordi Pasquo, Mercedes
dc.date2010-07-01
dc.date.accessioned2019-05-17T13:05:38Z
dc.date.available2019-05-17T13:05:38Z
dc.identifierhttp://www.andeangeology.cl/index.php/revista1/article/view/V36n1-a07
dc.identifier10.5027/andgeoV36n1-a07
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/95941
dc.descriptionRESUMEN:Se analiza e ilustra, por primera vez, una tafoflora hallada en estratos de la Formacion Tarija que aflora en Arroyo Aguas Blancas, Provincia de Salta, Argentina. Se describen, tambien, dos especies nuevas: Malanzania starckii (licofita) y Grumosisporites delpapae (espora trilete). Se reconocieron improntas de semillas platispermicas (Sama-ropsis nunezii Garcia emend. A. Archangelsky, Cordaicarpus cesariae Gutierrez, Ganuza, Morel y Arrondo emend. A. Archangelsky), improntas de tallos articulados {Paracalamites australis Rigby emend. Zampirolli y Bernardes de Oliveira) y compresiones/improntas de fragmentos foliares (Cordaites riojanus Archangelsky y Leguizamon, Ginkgo-phyllum sp. cf. G. diazii Archangelsky y Arrondo). Esta asociacion es atribuida al Pennsylvaniano s.l. sobre la base de la distribucion estratigrafica de las especies seminales. La asociacion palinologica se compone de 101 especies, 53 de ellas reconocidas como autoctonas y 48 retrabajadas. El primer conjunto comprende 34 especies de esporas trilete, 11 granos de polen monosacado, un grano bisacado y siete especies de algas. El grupo retrabajado se compone de 27 esporas trilete y criptosporas, 20 especies de acritarcas, prasinofitas y otras algas y un quitinozoario. La presencia de especies exclusivas de la BiozonaD. bireticulatus-C. chacoparanensis (BC) (e.g., Dictyotriletes bireticulatus (Ibrahim) Potonie y Kremp emend. Smith y Butterworth, Crucisaccites latisulcatus Lele y Maithy, Verrucosisporites morulatus (Knox) Potonie y Kremp emend. Smith y Butterworth), permite acotar su edad al Bashkiriano tardio-Moscoviano. La vegetacion, compuesta principalmente por licofitas, esfenofitas, pteridofitas y gimnospermas, se habria desarrollado en diferentes ambientes continentales como lagos y rios alimentados por glaciares de montana.es-ES
dc.descriptionFossil plant remains found in the Tarija Formation cropping out at the Aguas Blancas creek, Aguaragüe range, Salta Province, Argentina, are analy sed and illustrated for the first time. Two new species, Malanzania starckii (Lycophyte) and Grumosisporites delpapae (trilete spore) are described. Molds and impressions of platispermic seeds (Samaropsis nunezii García emend. A. Archangelsky, Cordaicarpus cesariae Gutiérrez, Ganuza, Morel and Arrondo emend. A. Archangelsky), impressions of articulated stems (Paracalamites australis Rigby emend. Zampirolli and Bernardes de Oliveira) and compressions/impressions of fragmented leaves {Cordaites riojanus Archangelsky and Leguizamón, Ginkgophyllum sp. cf G. diazii Archangelsky and Arrondo) were recorded. This assemblage is attributed to the Pennsylvanian s.l. based on stratigraphic ranges of platispermic seeds. The palynological assemblage is made up of 101 species of which 53 are authocthonous and 48 are reworked. The former group is composed of 34 trilete spore species, 11 monosaccate pollen grains, one bisaccate pollen grain and seven algal species. The reworked group comprises 27 trilete spores and cryptospores, 20 species of acritarchs, prasinophytes and other algae and one chitinozoan. The whole assemblage is attributed to the late Bashkirian-Moscovian based on the recognition of exclusive species of the D. bireticulatus-C. chacoparanensis (BC) Zone (e.g., Dictyotriletes bireticulatus (Ibrahim) Potonié and Kremp emend. Smith and Butterworth, Crucisaccites latisulcatus Lele and Maithy, Verrucosisporites morulatus (Knox) Potonié and Kremp emend. Smith and Butterworth). The vegetation, mainly composed of Lycophytes, Sphenophytes, Pteridophytes and Gymnosperms, would have developed in different continental palaeoenvironments like lakes and rivers fed by mountain glaciers.en-US
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dc.languageeng
dc.publisherServicio Nacional de Geología y Mineríaen-US
dc.relationhttp://www.andeangeology.cl/index.php/revista1/article/view/V36n1-a07/813
dc.relationhttp://www.andeangeology.cl/index.php/revista1/article/view/V36n1-a07/html
dc.sourceAndean Geology; Vol 36, No 1 (2009); 95-124es-ES
dc.sourceAndean Geology; Vol 36, No 1 (2009); 95-124en-US
dc.source0718-7106
dc.source0718-7092
dc.titlePrimer registro de megafloras y palinologia en estratos de la Formacion Tarija (Pennsylvaniano), Arroyo Aguas Blancas, Provincia de Salta, Argentina: Descripcion de dos especies nuevas.es-ES
dc.titleFirst record of megafloras and palynology in the Tarija Formation (Pennsylvanian), Aguas Blancas creek, Salta Province, Argentina. Description of two new species.en-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typees-ES
dc.typeen-US


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