COROCORO COPPER DISTRICT OF BOLIVIA 17 



Meters 



27.2 Gray sandstone, gravelly toward top 

 4.4 Shale 



6.2 Gray sandstone 



12.3 Shale 



1.8 Gray conglomerate 



2.6 Gray sandstone 



1.8 Red sandstone 



4.4 Red shale 



4.4 Gray sandstone 



6.2 Gray pebbly conglomerate 



2.6 Gray sandstone 

 4.4 Red shak 



1.8 Gray sandstone with gravel 

 .9 Red sandstone 



12.3 Coarse gray irregularly-bedded sandstone with bands and 



lenses of pebbles 



.8 Gray sandstone with copper 



4.2 Shale 



2.9 Gray sandstone with bands of pebbles 

 5.9 Red shale 



1.3 Gray sandstone 

 .8 Conglomerate 



1.7 Pal e- red sandstone 

 5.9 Red shale 



3.4 Gray pebbly conglomerate 



.8 Gray sandstone with copper 



4.6 Red shale 



13.0 Red sandstone with bands of gravel and shale 



2.7 Red shale 



.9 Gray sandstone 



1.3 Red shale 



1.3 Red sandstone and shale 



1.3 Red shale 



4.9 Gray pebbly sandstone with subordinate shale bands 



1.3 Red Shale 



6.7 Alternating red sandstone and gravel bands 



2.2 Red sandstone 



2.2 Red shale 



2.7 Red sandstone 



4.5 Red shale 



7.2 Reddish sandstone 



2.7 Gray pebbly conglomerate 



5.8 Red shale 



