OCORRÊNCIA DE SEDIMENTOS MESOCRETÁCEOS TIPICAMENTE MARINHOS NO ESTADO DE ALAGOAS

GERALDO DA COSTA BARROS MUNIZ, FLÁVIO ROCHA, LUZINETE VICENTE DE OLIVEIRA RAMIRES

Resumo


In this work, typical middle cretaceous sediments in the Alagoas graben. State of Alagoas, belonging to the so called Sergipe-Alagoas basin, are mentioned for the first time. These sediments are silicified limestones containing cephalopods and indeterminable turritellid gastropods and bivalvia. The presence of the cephalopod genera Acanthohoplites and Lyelliceras also noted for the first time in Brazil permit one to give a probable Early Albian age to the respective sediments. Everything indicates a time correlation between these sediments and those of the Riachuelo Formation of the State of Sergipe. It is also very probable that both sediments are of the same formation, although silicified in Alagoan territory.

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