Botucatu Formation

The Caturrita Formation was once regarded as a member of the stratigraphically higher Botucatu Formation or was expanded to include the Mata Sandstone.

The large sand dune fields left behind thick, coarse to fine, sandstones beds, the Botucatu Formation, housing the important Guaraní Aquifer, one of the world's largest aquifer systems.

Above the Botucatu Formation a large igneous province was installed by the Serra Geral Formation - enormous flood basalts that occurred 137 to 127 million years ago, associated with the rifting of Gondwana and the opening of the South Atlantic Ocean.