Dalburg and Pratt : Bulacan Iron Ores.] 



[Phil. Journ. Sci., IX, A, No 3. 



izrra 



Post-Miocene 

 sedimentaries. 



Miocene 

 sedimentaries. 



Pre-Miocene 

 granite. 



EITusives with 

 minor intrusives. 



