INVESTIGADORES
CISTERNA Gabriela Adriana
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.; STERREN, A.F.
Revista:
AMEGHINIANA
Editorial:
ASOCIACION PALEONTOLOGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2015 vol. 52 p. 613 - 624
ISSN:
0002-7014
Resumen:
New palynological information from the El Paso Formation cropping out at the southern Sierra de Barreal (Calingasta-UspallataBasin), 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 recognized: Cyclogranisporites rinconadensis, Apiculatisporis variornatus, Raistrickiarotunda, Tricidarisporites gutii, Ahrensisporites sp. cf. A. cristatus, Cristatisporites stellatus, Indotriradites volkheimeri, Vallatisporites ciliarisand Psomospora detecta, among others. Also, subordinate pollen grains (1.5?20%): Circumplicatipollis plicatus, Costatascyclus crenatus, Plicatipollenitessp. cf. P. malabarensis, Potonieisporites spp. and Divarisaccus sp. cf. D. stringoplicatus. Recycled and autochthonous acritarchs (e.g.,Cymatiogalea sp., Gorgonisphaeridium sp., Verhyachium sp.) and Zygnematalean algae (Tetraporina sp., Brazilea scisa) with less of 2.5% are alsopresent. 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.
