"Permian pedogenesis in the Pedra de Fogo formation: characterization of paleosols and paleoenvironmental implications in the east of the Parnaíba Basin" (Master's). Candidate: Katrine Katiusse de Andrade. Advisor: professor Francisco Sergio Bernardes Ladeira. August 30, 2019, at 9 am, in room 213 of the IG.