Morphological aspects, textural features and chemical composition of spherules from the Colônia impact crater, São Paulo, Brazil - Velázquez Fernandez, Victor; Gomes, Celso B.; Mansueto, Marcos; Moraes, Leonardo A. S. de; Azevedo Sobrinho, José Maria; Lucena, Rodrigo Ferreira de; Sallun, Alethéa Ernandes Martins; Sallun Filho, William (Solid Earth Sciences, 2021)