Quaternary ironstones in the Xingu River, eastern Amazonia (Brazil) - Freire, Marília Prado; Góes, Ana Maria; Fairchild, Thomas R.; Gautheron, Cécile; Parra, Maurício; Pupim, Fabiano do Nascimento; Bertassoli Junior, Dailson José; Sousa, Leandro Melo de; Hartmann, Gelvam; Pinna-Jamme, Rosella; Sawakuchi, André Oliveira (Quaternary Research, 2022)