320 



The Philippine Journal of Science 



1913 



The lower part of Bahay River, where it cuts through the 

 eastern limb of the Maglihi anticline to the eastern coast, exposes 

 the section recorded in Table X. 



Table X. — Geologic section on the lower part of Bahay River; from the 

 mouth of the river inland. 



Formation. 



Description. 



Approx- 

 imate 

 thickness. 





Yellow to brown raised coral reefs and coral sand; 

 coastal plain. 



Meters. 

 10 







[Upper limestone; coralline; dip 30° northeast; 

 | east slope of the ridge near coast- 

 Cudiapi sandstone? ~\ concealed interva i 



15 



100 



140 



5 



8 



10 



3 

 10 



Canguinsa sandstone 



'Lower limestone? J 



Gray, bedded, clayey sandstone; dip 35° north- 

 east. 



Gravel or conglomerate, sandy matrix, large 

 pebbles of diorite, quartz, crystalline orbitoidal 

 limestone, etc. 



Coralline limestone grading into calcareous sand- 

 stone at base; dip 45° northeast. 





Unconformity? - 





(Sandstone and shale, irregular thin beds; small 

 seams of lignite; dip 55° northeast. 





Brown coarse-grained sandstone, thick bedded 



I to massive; carbonized leaf impressions. 



Blue to black carbonaceous shale; sandy; base 



j not exposed; dip 55° northeast; occasional out- 



/ crops only; 1, 500 meters northwest of the line 



of this section at about this horizon oil seeps 



from Bacau stage of Vigo shale on Milipilijuan 



Creek and at a somewhat greater distance 



southeast at Bahay, oil seeps from a con- 



\ cealed formation. 







