 The area of Belo Horizonte complex includes the geomorphological unit called "Depression of Belo Horizonte", which represents about 70% of the municipality area and has its greatest expression in the northern Ribeirão Arrudas (Rues Stream) pipeline.The metasedimentary rocks has its area of occurrence on the south of Ribeirão Arrudas pipeline, constituting about 30% of the area of Belo Horizonte.The characteristics of this area are lithological diversities and rugged topography, which has its maximum expression in the "Serra do Curral" (Corral Ridge), the southern boundary of the municipality.