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

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...

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Bibliographic Details
Published in:Geologia USP. Série Científica
Main Authors: Júnior Bispo de Menezes, Maria Judite Garcia, Eduardo Premaor, Paulo Eduardo De Oliveira, Mitsuru Arai, Mary Elizabeth Cerruti Bernardes-de-Oliveira, Pauline Sabina Kavali, Mahesh Shivanna
Format: Article in Journal/Newspaper
Language:English
Portuguese
Published: Universidade de São Paulo 2016
Subjects:
Cretaceous
Paleocene
Dinoflagellate cysts
Gondwanan paleobiogeographic distribution
Geology
QE1-996.5
Indian
New Zealand
Argentina
Uruguay
Antarc*
Antarctica
Online Access:https://doi.org/10.11606/issn.2316-9095.v16i4p135-149
https://doaj.org/article/5ee6ff3d408a45e38593201558e0c184
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Summary: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.

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