Palinomorfos de afinidad incierta en la perforación DI.NA.MI.GE. 254 “Paso de las Toscas” (Pérmico Inferior), Cuenca Paraná, Uruguay

Abstract

Un rasgo importante que presentan las asociaciones palinológicas del Neopaleozoico en las cuencas Paraná (tanto en Brasil como en Uruguay) y Chacoparaná (Argentina) es la presencia de palinomorfos del Silúrico-Devónico retrabajados

Syndesmorion stellatum (Fijałkowska) Foster et Afonin chlorophycean algae and associated microphytoplankton from lacustrine successions of the La Veteada Formation (late Permian), Paganzo Basin, Argentina. Paleoenvironmental interpretations and stratigraphic implications

“…As previously mentioned, the shallow lacustrine successions of the La Veteada Formation were initially deposited in Sierra de Narváez, where the palynological associations are consistent with a Guadalupian age for that section (Gutiérrez et al, 2011). In contrast, the Central Famatina deposition of this unit begins with paleosols of undefined age (b5 m), underlying a lacustrine succession deposited during the Lopingian (Zavattieri and Gutiérrez, 2012;Gutiérrez et al, 2015). The absence of records of the younger palynological association in the north may be due fact that to top of the sequence is eroded.…”

The palynology of the Ordóñez Formation (Pennsylvanian) in the Chacoparaná Basin, northern Argentina

“…The suprageneric classification of spores and pollen grains follows the criteria of Potonié & Kremp (1954) and subsequent modifications (Playford & Dettmann 1996). Reworked elements were identified on the basis of their poor state of preservation and their anomalous stratigraphic positions (see Gutiérrez et al 1997Gutiérrez et al , 2015. Schopf, Wilson & Bentall 1944 [OD] Calamospora fissurata sp.…”

Estudo do tonstein associado à jazida de carvão de Figueira (estado do Paraná, Brasil) e calibração de biozonas

“…Tetraporina) e esporos de fungo (Portalites e indeterminados). Os gêneros de alga Brazilea e Tetraporina evidenciam deposição em um ambiente de água doce (Gutiérrez & Limarino, 2001;Longhim, 2007;Guerra-Sommer et al, 2008d;Gutiérrez et al 2015) enquanto que o gênero Navifusa é considerada como parte de microplâncton marinho (Gutiérrez & Limarino, 2001;Jasper et al, 2006), e poderia ser indicativo de pequenas ingressões marinhas, uma vez que a quantidade registrada é muito baixa.…”