Produção Nacional
The Furnas/Ponta Grossa contact and the age of the lowermost Ponta Grossa Formation in the Apucarana Sub-Basin (Paraná Basin, Brazil): integrated palynological age determination
2010; Volume: 13; Issue: 2 Linguagem: Inglês
10.4072/rbp.2010.2.02
ISSN2236-1715
AutoresYngve Grahn, Paula Mendlowicz Mauller, Pierre Breuer, Elvio Pinto Bosetti, Sérgio Bergamaschi, Egberto Pereira,
Tópico(s)Geology and Paleoclimatology Research
ResumoThe Furnas/Ponta Grossa Formation contact was until recently considered gradational or abrupt and of a Lochkovian to Pragian age in the Apucarana Sub-basin (Paraná Basin, south Brazil).Based on sedimentology and palynomorph evidence a hiatus has been revealed between the Furnas Formation and the overlying Ponta Grossa Formation.The boundary between the topmost Furnas sandstones and the lowermost Ponta Grossa fine-grained sandstones constitutes a transgressive ravinement surface generated during a latest Pragian -early Emsian transgression.The hiatus corresponds to a maximum of ca. 4 Ma.A similar gap is also present in the Alto Garças Sub-basin.
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