Ipubi Formation
The formation is dated to the Aptian to Albian stages of the Early Cretaceous , unconformably overlying the Crato Formation and unconformably overlain by the Romualdo Formation , formerly known as the Romualdo Member of the Santana Formation . 
<triplet> Aptian <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 <triplet> Romualdo Formation <subj> Crato Formation <obj> overlies