Lagoa Salgada is also a salty lake in the north of the same state, in which are found stromatolite formations that provide ancient records of some kind of layered rock structure that is formed above water at 21°54'10"S 41°00'30"W.[6]
^"Divisão Territorial do Brasil" (in Portuguese). Divisão Territorial do Brasil e Limites Territoriais, Instituto Brasileiro de Geografia e Estatística (IBGE). July 1, 2008. Retrieved December 17, 2009.