THE GEOLOGY OF THE COROCORO COPPER DISTRICT 

 OF BOLIVIA 



By JOSEPH T. SINGEWALD, JR. and EDWARD W. BEKRY 

 CONTENTS 



PAGE 



Introduction. . . . I 



Location 4 



Geology . 6 



Earlier descriptions 6 



The Vetas and Ramos esries 13 



The Vetas series 13 



The Ramos series 28 



Age of the Vetas and Ramos 35 



The Vetas flora 39 



Palentologic evidence of the age of the Ramos 43 



Stratigraphic relations of the Vetas and Ramos 44 



The Desaguadero series 49 



Age of the Desaguadero series 50 



Igenous rocks 53 



Resume of geologic history 55 



The ore deposits 57 



Earlier descriptions 57 



Summary account of the ore deposits 66 



Genesis of the Corocoro copper deposits 69 



Genetic comparison with the Lake Superior deposits. ...... 76 



Conclusions concerning genesis of the Corocoro deposits... 79 



Mining operations 81 



Treatment of the ore 82 



Systematic account of the fossil plants 87 



Bibliography 1 16 



677358 



