The Carrancas Formation (base of the Bambui basin) was deposited in a rift basin.
A pre-Marinoan sedimentation is suggested for the Carrancas Formation.
Carbon isotopic chemostratigraphy imply correlation with the global Keele peak.
The Carrancas Formation correlates with the Tijucuçu sequence, in the Aracuaí belt.
Cryogenian interglacial strata was not previously known on the São Francicso craton.