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Cretaceous ammonite zonation of the Sergipe Basin, northeastern Brazil

2017; Elsevier BV; Volume: 88; Linguagem: Inglês

10.1016/j.cretres.2017.07.021

1095-998X

Peter Bengtson, Maria Helena Zucon, Anderson da Conceição Santos Sobral,

Marine Biology and Ecology Research

A biostratigraphic zonation scheme based on ammonites is presented for the Cretaceous of the Sergipe Basin in northeastern Brazil. The marine beds range from the upper Barremian to the Maastrichtian, of which the Aptian–Coniacian and Campanian successions have yielded ammonites. The historical development leading to the current ammonite zonation is illustrated schematically. For each of the 22 biozones, the most important taxa are listed. Correlation with the "standard zonation" for ammonites remains largely tentative as a result of provincialism of the faunas.