Itapecuru Formation
It was formed during the Aptian to Albian stages of the Early Cretaceous . 
<triplet> Aptian <subj> Albian <obj> followed by <subj> Early Cretaceous <obj> part of <triplet> Albian <subj> Early Cretaceous <obj> part of <triplet> Early Cretaceous <subj> Aptian <obj> has part <subj> Albian <obj> has part