Lagoa Salgada is a salty lake in north of state of Rio de Janeiro, Brazil, that are found Stromatolites formation that provide ancient records of some kinds of layered rock structure that is formed above water at 21°54'10S 41°00'30W 
^"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.