M
Margot Guerra-Sommer
Researcher at Universidade Federal do Rio Grande do Sul
Publications - 85
Citations - 1226
Margot Guerra-Sommer is an academic researcher from Universidade Federal do Rio Grande do Sul. The author has contributed to research in topics: Permian & Gondwana. The author has an hindex of 19, co-authored 81 publications receiving 1071 citations.
Papers
More filters
Journal ArticleDOI
The burning of Gondwana: Permian fires on the southern continent—A palaeobotanical approach
André Jasper,Margot Guerra-Sommer,Abdalla Abu Hamad,Marion K. Bamford,Mary Elizabeth Cerruti Bernardes-de-Oliveira,Rajni Tewari,Dieter Uhl +6 more
TL;DR: In this paper, macroscopic charcoal occurrences are compared to inertinite incidences to support the pyrogenic origin for these coal macerals and to provide an up to date overview on the known evidences of Permian wildfires on Gondwana in space and time.
Journal ArticleDOI
Radiometric age determination of tonsteins and stratigraphic constraints for the Lower Permian coal succession in southern Paraná Basin, Brazil
Margot Guerra-Sommer,Miriam Cazzulo-Klepzig,João Orestes Schneider Santos,Léo Afraneo Hartmann,João Marcelo Ketzer,Milton Luis Laquintinie Formoso +5 more
TL;DR: In this article, the authors used the ion microprobe (SHRIMP II) to date zircons from tonsteins interbedded with coal seams from the Candiota and Faxinal coalfields (Early Permian, Rio Bonito Formation, Parana Basin, Brazil).
Journal ArticleDOI
U–Pb dating of tonstein layers from a coal succession of the southern Paraná Basin (Brazil): A new geochronological approach
Margot Guerra-Sommer,Miriam Cazzulo-Klepzig,Milton Luiz Laquintinie Formoso,Rualdo Menegat,João Graciano Mendonça Fo +4 more
TL;DR: In this paper, the authors presented new radiometric dating of zircons from tonsteins interbedded with coal seams from the Candiota coalfield (Rio Grande do Sul State).
Journal ArticleDOI
Geochronological data from the Faxinal coal succession, southern Paraná Basin, Brazil: A preliminary approach combining radiometric U-Pb dating and palynostratigraphy
Margot Guerra-Sommer,Miriam Cazzulo-Klepzig,Rualdo Menegat,Milton Luiz Laquintinie Formoso,Miguel Ângelo Stipp Basei,Eduardo Guimarães Barboza,Margarete Wagner Simas +6 more
TL;DR: A radiometric zircon age of 285.4±8.6 ǫ (IDTIMS U-Pb) is reported from a tonstein layer interbedded with coal seams in the Faxinal coalfield, Rio Grande do Sul, Brazil.
Journal ArticleDOI
Geochronological correlation of the main coal interval in Brazilian Lower Permian: Radiometric dating of tonstein and calibration of biostratigraphic framework
Margarete Wagner Simas,Margot Guerra-Sommer,Miriam Cazzulo-Klepzig,Rualdo Menegat,João Orestes Schneider Santos,José Alcides Fonseca Ferreira,Isabela Degani-Schmidt +6 more
TL;DR: In this article, the mean age of the main peat-forming interval is calculated using SHRIMP II data from the Leao-Butia Coalfield, southern Parana Basin (Rio Grande do Sul state).