COROCORO COPPER DISTRICT OF BOLIVIA 21 



Meters 



4.0 Alternating gray sandstone and conglomerate 



.7 Red shale 



.7 Gray conglomerate 



1.3 Red shale 



2.3 Conglomeratic sandstone 

 4.0 Red shale 



4.7 Conglomerate 



4.0 Red shale 



2.0 Conglomerate 



.3 Red shale 



2.7 Red and gray sandstone with pebble beds 



1.4 Conglomerate 

 2.7 Red shale 



i.o Conglomeratic sandstone 



.7 Red shale 



3.0 Conglomerate 



3.7 Red shale 



1.4 Gray sandstone 



1.4 Red shale 



3.4 Conglomeratic sandstone 

 2.0 Red shale 



1.3 Conglomerate 



2.5 Red shale 



3.6 Coarse, gray, friable sandstone, pebbly and irregularly- 



bedded in lower part 



1.8 Bright red shale with inconspicuous narrow bands of red- 



dish sandstone 



.4 Gray sandstone 



23.5 Red shale with scarcely indurated red sandstone in middle 



2.5 Gray sandstone with conglomeratic bands a few inches thick 



2.7 Red shale 



i.o Gray sandstone with conglomerate beds 



2.4 Red shale 



2.2 Gray sandstone with conglomeratic bands 

 .5 Red shale 



.7 Red sandstone 



2.5 Red shale 

 5.4 Conglomerate 



6.8 Red shale 

 Red shale 

 Conglomerate 



5.3 Red shale 



.5 Conglomerate 



