THE PHILIPPINE 



Journal of Science 



A. Chemical and Geological Sciences 

 AND THE Industries 



Vol. X MAY, 1915 No. 3 



ISOTES ON A GEOLOGIC RECONNAISSANCE OF MOUNTAIN 

 PROVINCE, LUZON, P. I.^ 



By Warren D. Smith 

 (From the Division of Mines, Bureau of Science, Manila, P. I.) 



FIVE PLATES AND 5 TEXT FIGURES 



contents 



Introduction. Geology, General — Continued. 



Field itinerary. The plutonic rocks. 



Past work. The extrusives. 



The military districts of Lepanto The sedimentaries. 



and Bontoc. The structure. 



Geography. Geology, Historical. 



Topography. Geology, Economic. 



Climate. Nonmetals. 



Hydrography. Water. 



Vegetation. Metals, 



People. Summary. 

 Geology, General. 



General statement. 



INTRODUCTION 



The following notes are the result of a geologic reconnaissance 

 made by me during March and April, 1914, in the subprovinces of 

 Bontoc and Kalinga with side excursions of less importance into 

 Lepanto and Ifugao. 



The rugged nature of the country, the lack of any trained assist- 

 ants, and the semiwild character of the people combined to pre- 

 vent the execution of any detailed or accurate work at this time. 

 Primary triangulation is just now being carried out for the first 



'■ Received for publication November 27, 1914. 



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