The Nitrogen Cycle in an Epeiric Sea in the Core of Gondwana Supercontinent: a Study on the Ediacaran-Cambrian Bambuí Group, East-central Brazil - Fraga-Ferreira, Paula Luiza; Ader, Magali; Caetano-Filho, Sergio; Sansjofre, Pierre; Paula-Santos, Gustavo; Babinski, Marly; Guacaneme, Cristian; Bedoya-Rueda, Carolina; Rojas, Virginia; Reis, Humberto Luis Siqueira; Kuchenbecker, Matheus; Trindade, Ricardo Ivan Ferreira da (Frontiers in Earth Science, 2021)