X, A, 5 Pratt: Reconnaissance in Caramoan Peninsula 311 



of schistosity being parallel to the bedding. The beds are much 

 crumpled and distorted, but nowhere is the original stratification 

 obliterated. I obtained an incomplete section of the metamor- 

 phic sedimentaries in the vicinity of Sabang, along a stream 

 which flows into Lagonoy River from the north. The following 

 succession of beds was encountered traveling inland from the 

 coast; since the general strike is west-northwest and the dip 

 is to the south-southwest, the first beds encountered are the 

 youngest and represent the upper part of the series : 



Table I. — Geologic section north of Sabang. 



Stratum. 



Green schists, imperfectly bedded; compact, hard rocks 



Fine-grained, homogeneous marble; gray to white 



Thin fissile beds of talc-schist, schistose shale, and micaceous schists; green, yellow, 



and brown; quartz lensqs along bedding planes 



White and blue marble 



Fissile beds of schist like above, but gradually passing into schistose, massive, light 



green or blue clastic rocks 



White marble 



Massive schistose fragmental rocks, light green to blue 



Approx- 

 imate 

 thick- 

 ness. 



Meters. 



200 



20 



500 

 2 



800 

 5 

 W 



" Undetermined. 



I was unable to carry this section farther to the north because 

 of the difficulty of penetrating the mountainous country; con- 

 sequently I did not arrive at the base of the series. In crossing 

 the peninsula from Lagonoy to Sipaco, I passed to the west of 

 the line of the section just recorded and traversed, throughout 

 nearly the entire width of the peninsula, bedded schists with 

 quartz along the bedding planes. However, near the center of 

 the peninsula, the strike of the beds changes from west-north- 

 west to north-northeast, the dip swinging to the west, so that the 

 width of the peninsula is greater than the length of a section 

 across the schist formation. The westward-dipping rocks are 

 less thoroughly metamorphosed than the schists and are clearly 

 thin-bedded shale. On the north coast, also, there is an outcrop 

 of metamorphic rocks, identical in appearance with the thin- 

 bedded shale of the Tertiary sedimentaries, except for the 

 metamorphism. These particular beds retain their original 

 appearance unusually well, because of the fact that they have 

 neither been distorted nor rendered schistose, but have been 

 changed through induration and silicification only. The quartz 

 lenses along the bedding and schistosity planes in the schist 



