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This study constitutes a new biostratigraphic approach from an outcrop of the Itaituba Formation, in the Itaituba City, southern Amazonas Basin, Para State, Brazil, integrating conodont and palynological data. Conodont associations includes Idiognathodus incurvus , Idiognathoides sinuatus , Adetognathus lautus , Hindeodus minutus , Diplognathodus coloradoensis , D. orphanus and D. ellesmeremsis. Among the palynomorphs, Costatascyclus  crenatus , Protohaploxypinus amplus , Spelaeotriletes arenaceus , S. triangulus , Meristocorpus explicatus , Striomonosaccites incrassatus and Meristocorpus sp. B constitute important biostratigraphic species, suggesting a middle Atokan age for the study section, in agreement with conodont biostratigraphy.

pesquisas em geociências

BIOESTRATIGRAFIA (CONODONTES E PALINOLOGIA) DA FORMAÇÃO ITAITUBA (PENSILVANIANO DA BACIA DO AMAZONAS), EM UM DEPÓSITO SELECIONADO EM ITAITUBA, ESTADO DO PARÁ, BRASIL