Similarities of the K/Pc dinoflagellate cyst associations between South Atlantic and Indian proto-oceans

Abstract

In this contribution we present the composition of the Late Cretaceous / Paleocene dinoflagellate cyst assemblages found in the Pelotas Basin, southern Brazil in order to provide a first paleobiogeographical comparison between this location, India and other former Gondwana continents: South America (Argentina and Uruguay), Africa (Nigeria and Western Ghana), Antarctica, Australia, and New Zealand. A total of 13 taxa, some endemic and other cosmopolitan were identified. The paleoenvironment of the Gondwana former members basins, as previously presented and attested by the dinoflagellate cysts are marginal marine nearshore, varying from neritic to shallow neritic and lagoonal or coastal swamps, which permitted the deposition of sediments in anoxic marine conditions. The present analysis of similarity between K/Pc dinoflagellate cyst associations allowed the establishment of paleobiogeographic distribution.

Crono-correlação entre as Bacias do Camaquã (RS) e do Itajaí (SC): implicações Paleoambientais e Paleogeográfica

“…Embora a transgressão tenha sido generalizada, alguns sıtios palinológicos (5,12,13,19,27) não documentam a in luencia marinha, o que pode ser resultante do grau Figura 3 -Grá ico de riqueza dos táxons de esporos, dos grãos de pólen e dos cistos de dino lagelados, distribuıdos nos poços BP-01 e BP-02, na porção offshore da Bacia de Pelotas (inedito de Premaor, 2016).…”

Bacia de Pelotas em retrospectiva

“…Embora a transgressão tenha sido generalizada, alguns sıtios palinológicos (5,12,13,19,27) não documentam a in luencia marinha, o que pode ser resultante do grau Figura 3 -Grá ico de riqueza dos táxons de esporos, dos grãos de pólen e dos cistos de dino lagelados, distribuıdos nos poços BP-01 e BP-02, na porção offshore da Bacia de Pelotas (inedito de Premaor, 2016).…”