Iron Quadrangle
mining region between upper Doce river basin and upper São Francisco river basin; Minas Gerais, Brazil
en-US/ˌaɪɹn ˈkwɑdˌɹæŋɡəl/
en-GB/ˈaɪən ˈkwɒdɹæŋɡl/
mining region between upper Doce river basin and upper São Francisco river basin; Minas Gerais, Brazil