Age constraints of the glaciation in the Paraná Basin: evidence from new U–Pb dates

Faccini, Ubiratan Ferrucio

Age constraints of the glaciation in the Paraná Basin: evidence from new U–Pb dates

Posted on 2016-06-28 - 09:57

The absence of absolute dating in glacial deposits of the Paraná Basin prevents better understanding of the complete history of the Late Palaeozoic Ice Age in Western Gondwana and the climatic change that took place in the late Carboniferous. In this study, new U–Pb radiometric ages date the topmost glacial deposits of the Itararé Group at 307.7 ± 3.1 Ma (Kasimovian–Moscovian) and the base of post-glacial deposits of the Rio Bonito Formation at 298.8 ± 1.9 Ma (Ghzelian–Asselian). Correlation of glacial and post-glacial deposits of the Paraná Basin with other southwestern Gondwana basins shows that the end of the Late Palaeozoic Ice Age is asynchronous.

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Cagliari, Joice; Philipp, Ruy Paulo; Buso, Victoria Valdez; Netto, Renata Guimarães; Hillebrand, Peter Klaus; da Cunha Lopes, Ricardo; et al. (2016). Age constraints of the glaciation in the Paraná Basin: evidence from new U–Pb dates. Geological Society of London. Collection. https://doi.org/10.6084/m9.figshare.c.3278273.v1

https://doi.org/10.6084/m9.figshare.c.3278273.v1

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