INSUGEO   12554
INSTITUTO SUPERIOR DE CORRELACION GEOLOGICA
Unidad Ejecutora - UE
artículos
Título:
New palynological records from the glaciomarine deposits of the El Paso Formation (late Serpukhovian-Bashkirian) in Argentine Precordillera: Biostratigraphical implications
Autor/es:
VERGEL, M.M.; CISTERNA, G.A.; STERRENS, A.
Revista:
AMEGHINIANA
Editorial:
ASOCIACION PALEONTOLOGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2015 vol. 52 p. 613 - 613
ISSN:
0002-7014
Resumen:
New palynological information from El Paso Formation cropping out at the southern Sierra de Barreal (Calingasta-Uspallata Basin), San Juan province, Argentina is presented. The palynologic assemblages were recovered from the middle to upper part of the section. Abundant trilete (75?90%) and hilate (1?5%) spore species are documented, such as Calamospora hartungiana Schopf in Schopf, Wilson and Bentall, Punctatisporites spp., Grossusporites microgranulatus (Menéndez and Azcuy) Pérez Loinaze and Césari, Cyclogranisporites rinconadensis Césari and Limarino, Apiculatisporis variornatus di Pasquo, Azcuy and Souza, Anapiculatisporites sp. cf. A. conccinus Playford, Lophotriletes intermedius Azcuy, Verrucosisporites chiqueritensis Ottone, V. cortaderensis Perez Loinaze, Raistrickia spp., Tricidarisporites gutii Césari and Limarino, Spinozonotriletes hirsutus Azcuy, Ahrensisporites sp. cf. A. cristatus Playford and Powis, Densosporites sp., Cristatisporites spp., Indotriradites volkheimeri (Azcuy) Perez Loinaze, Vallatisporites ciliaris (Luber) Sullivan, Spelaeotriletes triangulus Neves and Owens and Psomospora detecta Playford and Helby. Also, subordinate pollen grains (1.5?20%): Circumplicatipollis plicatus Ottone and Azcuy, Costatascyclus crenatus Felix and Burbridge emend. Urban, Plicatipollenites sp. cf. P. malabarensis (Potonié and Sah) Foster, Potonieisporites spp., Divarisaccus sp. cf. D. stringoplicatus Ottone. Acritarchs (Baltisphaeridium sp., Cymatiogalea sp., Gorgonisphaeridium spp., Verhyachium sp.) and Zygnematalean algae (Tetraporina sp., Brazilea scisa (Balme and Hennelly) Foster) are present with less of 2.5%.<!--[endif]--> The spores Retusotriletes incohatus Sullivan, Reticulatisporites sp. and Auroraspora sp. and some acritarchs have been considered reworking material. We propose a late Serpukhovian?Bashkirian age, and a correlation with the Subzone A of the Raistrickia densa-Convolutispora muriornata (DM) Biozone to the El Paso assemblages.<!--[if !supportAnnotations]--> <!--[if !supportAnnotations]--><!--[endif]-->
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