1988
DOI: 10.25249/0375-7536.1988231236
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Stratigraphic analysis of the marine cretaceous in the eastern margin of Portiguar Basin

Abstract: A detailed sedimentologic-paleoecologic investigation was carried out in lhe marine Cretaceous section (Albian to Maestrichtian) of lhe Potiguar Basin. Underlying Alagoas rocks are Jacustrlne-deltaic sandstones and shales, and minor limestones lhat represent regional markers; lacustrine fauna is represented by ostracod coquinas, vertebrate rernains, stromatolítes, and molJusks. The rnarine section was divided into six major depositiona! sequences wíth chronostratigraphic character: shelf clastic and carbonate … Show more

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