Coordinate system._____________________________ Geography___________________________________ Previous investigations._________________________ Present investigation.___________________________ Acknowledgments__ ___________________________ Geologic setting.___________________________________ Quadrilatero Ferrff ero___________________________ Western Serra do Curral______________________ Stratigraphy______________________________________ Rio das Velhas Series__________________________ Nova Lima Group._________________________ Schists and phyllites.___________________ Ferruginous phyllite and iron-formation__ Other rocks.___________________________ Minas Series.__________________________________ Caraga Group._____________________________ M oeda Formation ______________________ Batatal Formation....__________________ Itabira Group_____-_____._______________':__ CauS Itabirite_-_-___-_____-____________ Cau£-Gandarela contact-________________ Gandarela Formation...___________ _____ Piracicaba Group___________________________ Cercadinho Formation_________________ FScho do Funil Formation.______________ Tabo5es Quartzite._____________________ Barreiro Formation____________________ Sabara Formation._____________________ Cenozoic deposits._._-_-__-_-__-_______________ Igneous rocks._____________________________________ Granitic rocks._________________________________ Itabirito(?) Gneiss._________________________ Group IV gneiss in the Itauna uplands. _______ Souza Noschese Gneiss._____________________ Group III gneiss in the Igarap< § pediments_____ Dike rocks.____________________________________ Structure._________________________________________ Bonfim gneiss dome_____________________________ Gneiss dome north of the Serra do Curral________

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