Sequence stratigraphy and biostratigraphy of the Late Carboniferous to Early Permian glacial succession (Itararé subgroup) at the eastern-southeastern margin of the Paraná Basin, Brazil

Author(s):  
Michael Holz ◽  
Paulo A. Souza ◽  
Roberto Iannuzzi
2011 ◽  
Vol 83 (2) ◽  
pp. 471-481 ◽  
Author(s):  
André Jasper ◽  
Dieter Uhl ◽  
Margot Guerra-Sommer ◽  
Abdalla M. B Abu Hamad ◽  
Neli T. G Machado

Fossil charcoal has been discovered in the Faxinal Coalfield, Early Permian, Rio Bonito Formation, in the southernmost portion of the Paraná Basin, Brazil. Three types of pycnoxylic gymnosperm woods recovered from a single tonstein layer are described and confirm the occurrence of paleowildfire in this area. A decrease of the charcoal concentration from the base to the top within the tonstein layer indicates that the amount of fuel declined during the deposition probably due to the consumption of vegetation by the fire. The presence of inertinite in coals overlying and underlying the tonstein layer indicates that fire-events were not restricted to the ash fall interval. The integration of the new data presented in the current study with previously published data for the Faxinal Coalfield demonstrates that volcanic events that occurred in the surrounding areas can be identified as one potential source of ignition for the wildfires. The presence of charcoal in Permian sediments associated with coal levels at different localities demonstrates that wildfires have been relatively common events in the peat-forming environments in which the coal formation took place in the Paraná Basin.


Terr Plural ◽  
2021 ◽  
Vol 15 ◽  
pp. e2117741
Author(s):  
Rafael Costa da Silva ◽  
◽  
Antonio Carlos Sequeira Fernandes ◽  

The sedimentary layers of Anitápolis, Santa Catarina, were the subject of relevant discussions about age and paleoenvironment in the first half of the 20th century. Today they are correlated to the ritmites from Itararé Group, but some of the fossils that are part of these studies were not subsequently revised. This is the case of Oliveirania santa catharinae (sic) Maury 1927, a species originally attributed to annelids, and the ichnofossils attributed to it by association. The Annelida fossils were considered here as pseudofossils of inorganic origin. The ichnofossils attributed to Oliveirania were redescribed as a new ichnospecies, Pterichnus mauryae isp. nov., possibly related to the activity of crustaceans. This is the first occurrence of Pterichnus in Brazil and the oldest in the world.


2020 ◽  
Vol 228 ◽  
pp. 103554
Author(s):  
Marcos Müller Bicca ◽  
Wolfgang Kalkreuth ◽  
Taís Freitas da Silva ◽  
Christie Helouise Engelmann de Oliveira ◽  
Frederico Antonio Genezini

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