The Adamantina Formation is a geological formation belonging to the Bauru Group, State of São Paulo, Brazil, being the youngest of this, included in the Upper Cretaceous, in the late Campanian to Maastrichtian. During the deposition of the Adamantina Formation there existed long and dry periods that caused the segmentation of the large lakes (due to the topographic irregularities in the basaltic substrate) and sometimes the expositions of the lake floors; when flooded these floors of the lake were colonized by extensive meadows of single species of charophytes. Paleontology Dinosaurs
In addition to mollusks, chelonian fish,
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