[1] According to some studies,[2][3][4][5] the Adamantina Formation dates from the Turonian to the Santonian stage (90-83.5 million years ago) of the late Cretaceous, other studies have found a much younger age - Campanian to Maastrichtian (83.5-66 million years ago) of the late Cretaceous.

[10] During the Early Jurassic, the supercontinent Pangea started to drift apart due to the breakup of Gondwana and Laurasia.

[12] The separation of the supercontinent and the breakup of Brazil and Africa was accompanied by volcanism that caused large eruptions of flood basalts.

These volcanic rocks formed the Serra Geral Formation which underlies the deposits of the Bauru Group.

[14] The Bauru Group can be subdivided into five different formations [12][15][16][17] from bottom to top: Caiua, Santo Anastacio, Adamantina, and Uberaba.