The Guaratiba Group is 4200 meters thick and subdivided into three formations, four if the underlying basalts of the Camboriú Formation are included, Clemente, 2013, p.20 and five if the salt layer of the Ariri Formation is included, Contreras, 2011, p.22 from old to young the Piçarras, Itapema, and Barra Velha Formations.