Reinterpretación paleoambiental de la Formación Rio Bonito (Pérmico de la Cuenca de Paraná) en el yacimiento de carbón de Iruí, Rio Grande do Sul, Brasil: Integración de análisis de facies, ¡enología y estratigrafía secuencial de alta resolución

Abstract

The Permian Rio Bonito Formation of the Parana Basin, southern Brazil, has been traditionally interpreted in terms of a fluvio-dominated deltaic model. Integration of facies analysis, ichnology, and high-resolution sequence stratigraphy suggests that this unit represents deposition in a tide-dominated, fluvio-estuarine valley system. The overlying Palermo Formation records deposition in open-marine environments