Pyrite as a proxy for the identification of former coastal lagoons in semiarid NE Brazil - Ferreira, Tiago Osório; Nóbrega, Gabriel Nuto; Albuquerque, Antonia G. B. M; Sartor, Lucas Resmini; Gomes, Irlene S; Artur, Adriana Guirado; Otero, Xosé Luís (Geo-Marine Letters, 2015)