BULLETIN NO. 280 PL.! 
66 Hi 
6.< 
LEGEND 
QUATERNARY 
Alluvim 
TERTIARY 
(Kertai formation) 
CRETACEOUS? 
Impure sandstone 
CARBONIFEROUS 
Peimsylvanian? 
DEVONIAN 
Limestones, greenstones, 
quartzites,recL andblack 
slates 
Cherts , slates , 
and greenstones 
PRE-DEVONIAN 
Quartzite- schists , 
quartz-mi ca schists , 
painetiferous schists, 
and crystalline limestone 
Intrusive granitic and 
nionzonitic nocks 
