VIII, A, 5 



Pratt and Smith: Petroleum Resources 



321 



The gravel and coralline limestone between the Vigo shale 

 proper and the Canguinsa sandstone in the foregoing section 

 are unusual and their correlation is doubtful. It should be 

 stated that the character of the gravel and the relations of its 

 occurrence allay any suspicion that it is a recent, superimposed 

 deposit. 



Near Mount Morabi in the eastern limb of the Maglihi anticline, 

 south of Bahay, the section shown in Table XI was obtained. 



Table XI. — Geologic section in the vicinity of Mount Morabi; from the 

 coast at San Andres to the summit of the mountain. 



Formation. 



Description. 



Approx- 

 imate 

 thickness. 







Meters. 



Recent 



Yellow to brown, coralline, sandy limestone, lies 

 nearly horizontal; narrow coastal plain, vicinity 

 of San Andres. 



10 





Upper limestone, coralline _- 



15 



Malumbang series 



Cudiapi sandstone. Bedded calcareous sandstone. 

 Dip 30° east. 



30 





Lower limestone, coralline to sandy 



30 





Bedded, gray, calcareous sandstone; dip 55° east: 



50 





east face of Mount Maglihi and Mount Morabi. 







Yellow to white limestone with abundant coarse 



5 





sand, locally small pebbles of diorite and 





Canguinsa sandstone 



quartz, large Iepidocyclinas; dips steeply to east, 

 vertical and even overturned to west; summits 









of Mount Maglihi and Mount Morabi. 







Gray calcareous sandstone, bedded; west face of 



20 



' 



Mount Maglihi. 







Clayey, massive sandstone; valley west of Mount 

 \ Maglihi. 



40 













Vigo shale 



Bacau stage; bedded blue to gray shale with 







sandstone. Occasional outcrops in Canibo Creek; 







steep dips to east and west, thickness of a few me- 







ters only exposed; oil seep at Banco; salt water in 







Maalat Creek. 





