Upper Paleozoic charcoal remains from South America: Multiple evidences of fire events in the coal bearing strata of the Paraná Basin, Brazil

The occurrence of macroscopic fossil charcoal in sediments has widely been accepted by the scientific community to be a direct indicator for the occurrence of paleowildfires. For the Upper Paleozoic of the Northern Hemisphere, records of macroscopic charcoal are relatively common. On the other hand, for the Southern Hemisphere only a few records have been described for this period. For the Paraná Basin in particular, only a single occurrence of fossil charcoal has been described in detail so far. In this study, several occurrences are summarized for the Lower Permian Rio Bonito Formation (Sakmarian–Artinskian). Based on this study, it can be stated that macroscopic charcoal remains can be considered a common element throughout the Lower Permian coal-bearing interval in the southern and southeastern margin of the Paraná Basin. The occurrence of fossil macroscopic charcoal remains in different Late Paleozoic mire related clastic deposits of the Paraná Basin adds support to previous studies that have demonstrated the abundant presence of inertinite as a petrographic component of various coals in different coalfields in this particular basin. These charcoal occurrences support previous hypotheses that proposed that paleowildfires should have been common during the Early Permian in the Western Gondwana Realm.

► We present 7 localities with occurrence of fossil charcoal at Paraná Basin (Brazil). ► The anatomical characteristics of the material is examined. ► Information about the paleowildfires at the Gondwana in Early Permian are presented. ► The data support that paleowildfires are common in Early Permian at the Gondwana. ► High inertinite levels in Gondwana Permian Coals and paleowildfires are connected.