INVESTIGADORES
DI PASQUO LARTIGUE Maria De Las Mercedes
artículos
Título:
Avances sobre palinología, bioestratigrafía y correlación de los Grupos Macharetí y Mandiyutí, Neopaleozoico de la Cuenca Tarija, provincia de Salta, Argentina
Autor/es:
DI PASQUO, MARÍA DE LAS MERCEDES
Revista:
AMEGHINIANA
Editorial:
Asociación Paleontológica Argentina
Referencias:
Lugar: Ciudad Autónoma de Buenos Aires; Año: 2003 vol. 40 p. 3 - 32
ISSN:
0002-7014
Resumen:
Approaches on palynology, biostratigraphy and correlation of the assemblages present in the Macharetí and Mandiyutí Groups, Neopaleozoic of the Tarija Basin, Salta Province, Argentina. The recognition of 165 indigenous species and their stratigraphic range in the Macharetí and Mandiyutí Groups from Tarija Basin (northern Argentina and southern Bolivia), is used to propose a biostratigraphic scheme composed of a Superzone named Kraeuselisporites volkheimerii-Circumplicatipollis plicatus, which is divided into five First Appearance Interval Palynozones. The first three oldest zones, called Crassispora kosankei - Cystoptychus azcuyi, Raistrickia radiosa Apiculatasporites spinulistratus and Dictyotriletes bireticulatus Cristatisporites chacoparanensis, are attributed to an early-middle Late Carboniferous, while the other two ones, named Granulatisporites micronodosus Reticulatisporites reticulatus and Marsupipollenites triradiatus Lundbladispora braziliensis, are akin to the late Late Carboniferous. The age is based on the biostratigraphic range of several key-species and the place of each palynozone within the lithostratigraphic succession. The abundant presence of common species with other palynofloras from the Late Carboniferous of South America, specially from Argentina and Brazil also sustained this age. With respect to the 154 reworked species recognized, they confirm the deposition of Uppermost Devonian and Lower Carboniferous strata at the argentinean part of the basin that would have composed part of the cordilleran known as Oriental Protocordilleran and Michicola Arc. Both cordillerans have been the western and south-eastern boundaries of the Tarija Basin during the Late Carboniferous.
