COROCORO COPPER DISTRICT OF BOLIVIA 15 



Meters ' 



1.5 Red shale 



1.5 Coarse gray sandstone 



2.5 Sandy shale 



2.5 Fine gray sandstone 



i.o Red sandstone 



4.5 Red shale 



2.5 Gray gravelly sandstone, cross-bedded 



2.0 Sandy red shale 



4.0 Coarse sandstone 



1.5 Gray shale 



2.0 Fine gray sandstone 



3.0 Red shale 



i.o Fine gray sandstone 



i.o Red shale 



2.0 Coarse gray pebbly sandstone 



3.0 Fine gray sandstone, irregularly bedded, some shaly bands 



1.1 Gray sandstone 



1.6 Light shale 



2.6 Gray sandstone 



3.1 Red shale 



3.1 Gray sandstone 



12.1 Red shale 



1.6 Gray sandstone 



3.7 Red shale 



2.1 Gray sandstone 



i.i Red sandstone 



i.i Shale 



3.7 Gray sandstone, gravel at top 



2.1 Red shale 



.5 Gray pebbly sandstone 



2.6 Red shale 



2.6 Coarse gray pebbly sandstone 



4.7 Shale 



.5 Gray sandstone 



.5 Red shale 



19.4 Gray pebbly sandstone 



5.3 Red shale 



7.4 Coarse sandstone, very irregularly bedded, two copper bands 

 i i.o Thin-bedded red sandstone with cross-bedded lenses 



i.i Red sandstone 



8.9 Red shale 



i.i Gray sandstone 



16.8 Red shale 



