SILVA, Stephanie Carvalho da et al. CLASSIFYING THE REACTIVITY OF VOLCANIC ROCKS FROM THE SERRA GERAL GROUP: AN APPROACH USING A PROPOSED REACTIVITY INDEX (RI). Boletim Paranaense de Geociências, [S. l.], v. 83, n. 2, p. 1–10, 2025. DOI: 10.5380/bpg.v83i2.99861. Disponível em: https://revistas.ufpr.br/geociencias/article/view/99861. Acesso em: 4 jan. 2026.