"Petrographic and geochemical characterization of Archean layers formed by impact-derived spherules intercepted in four drill cores from the Fairview mine, Barberton Greenstone Belt, South Africa" (PhD). Candidate: Grace Juliana Gonçalves de Oliveira. Advisor: professor Álvaro Penteado Crósta. June 5, 2020, at 14 pm, in the IG videoconference room.