Abstract The objectives of this study were the biostratigraphic and paleobiogeographic interpretations of the calcareous nannofossil records of the Romualdo Formation (Aptian-Albian) in the south-central portion of the Araripe Basin. The methods used to process the samples were decanting. smear slide. centrifugation. https://lecoureures.shop/product-category/ski-de-fond-femme-sous-vetements-laine/