246 The Philippine Journal of Science mz 



He says: 



Little can be said as to the absolute age of the Kaal formation. No 

 fossils have been found, but judging from its position, its extreme contor- 

 tion and considerable metamorphism, it is my belief that it may be classed 

 provisionally as pre-Tertiary, * * *. 



My own comment at the time was : 



Metamorphism is no longer considered an indication of age; Tertiary 

 rocks have been subjected to profound dynamic stresses and are met- 

 amorphosed. Without fossils the question can not be satisfactorily settled. 



I am still of this opinion with regard to this particular form- 

 ation. 



On the Island of Panay there is a series of much indurated 

 sediments which is quite distinct from the later sediments known 

 certainly to be Tertiary. These were encountered in the upper 

 reaches of the Ulian River almost in the heart of the cordillera. 

 Their position, lithology, strike, and dip all preclude the pos- 

 sibility of their belonging to the younger series. In fact, an 

 intervening basal conglomerate makes this practically a certainty. 



This formation for the most part consists of very hard, fine- 

 grained material with fairly well-developed slaty cleavage. 

 In the same region, but not exactly associated with these beds, 

 are some red and green beds which have proved to be cherts and 

 serpentines. In these we found on microscopic examination of 

 thin sections some structures similar to those seen in the Ilocos 

 Norte cherts. 



Mr. Dalburg, formerly of this Bureau, recently brought from 

 Bulacan Province, Luzon, rocks similar to those found in Panay. 

 Slide preparations of these rocks revealed excellent sections of 

 radiolarian tests of Cenosphxra affinis Hinde and Dictyomitra 

 tenuis Hinde. 



Similar forms have been described by Hinde 16 in rocks col- 

 lected in central Borneo by Molengraaff. From his description 

 of these cherts and diabase tuffs I am more than ever inclined to 

 the opinion expressed in 1905 17 that these formations are 

 Mesozoic and that they are equivalent to those of the Moluccas, 

 Borneo, etc. 



The crystalline schists. — The crystalline schists are, in my 

 opinion, in part at least, of Tertiary age, and, as far as I can 

 tell from field evidence, they are in some places, at least, 

 metamorphosed Tertiary sandstones and shales. However, in 



"Hinde, Appendix to Molengraaff 's Borneo. Amsterdam (1899). 

 " This Journal, Sec. A (1907), 2, 145. 



