THE GEOLOGY OF CENTRAL MINAS GERAES, BRAZIL 



E. C. HARDER 

 Washington, D.C. 



AND 



R. T. CHAMBERLIN 

 University of Chicago 



PART I 

 Introduction 



General Geology 



General Distribution, Succession, and Structure of Formations 

 Probable Archean 



Basement Complex 

 Post-Archean Erosion Period 

 Probable Algonkian 



Caraga Quartzite 



Batatal Schist 



Itabira Iron Formation 



Piracicaba Formation 



Itacolumi Quartzite 



Summary 

 Pre-Devonian Deformation 

 Paleozoic — ^Early Mesozoic Erosion Period 

 Mesozoic — ^Early Tertiary Deposition 



Diamantina Conglomerate 

 Later erosion and deposition periods 



General Uplift 



Tertiary Canga Plains 



Conglomerate Formations 

 Present Status of Erosion 



Present Topography 



INTRODUCTION 



The South American continent bears resemblance to the North 

 American continent in several respects. Like the northern conti- 

 nent it may be divided according to its geologic history into an 

 eastern half and a western half. Like North America its Atlantic 



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