GEOLOGY OF THE PHILIPPINE ISLANDS. 



333 



with varying percentages of iron, lias been found in several localities. 

 However, there is a fairly well-defined belt which follows the east coast 

 of Luzon for a short distance, beginning in the Camarines and then 

 swinging into the interior, where it reaches, as far as our knowledge now 

 goes, its greatest development near the town of Angat in Bulacan Prov- 

 ince. 21 Three small blast furnaces of crude design are now operated by 

 a Filipino woman. 



The following is an analysis of the ore. 22 



Analysis of the iron ore from Angat. 



Constituent. 



Per cent. 



Constituent. 



Per cent. 



SiO» __ 



A1,0 3 



2.24 

 6.52 

 1.92 



88.22 

 0.18 



• 0. 12 



Na.,0 





K.,0 





FeO 



Pe 2 3 . 



H»0 - 



0.04 

 0.01 

 0.77 



CO* 



MgO . 



TiO* 



CaO 





Manganese, etc. — Manganese oxide occurs in Ilocos Norte in nodules 

 concentrated in shallow beds. The original location of this substance 

 has been traced by Smith 23 to small stringers in a recent andesite flow. 

 Manganese occurs in small pockets in the quartz veins in the gold districts 

 of Benguet, Masbate, and Camarines. 



THE NONMETALS. 



FUELS. 



Coal. — Coal is found on nearly every island of the Archipelago. The 

 principal localities are»Batan Island, Albay Province, Luzon; near Com- 

 postela and Danao, Cebu; near Cataingan, Masbate; near Bulalacao, 

 Mindoro; near Sibuguey Bay, Mindanao, and .near Burdeos, Polillo. The 

 coal measures belong to the Tertiary period. 



The coal is sub-bituminous, and an analysis (by Pox) from Batan 

 Island gives the following figures : 24 



Volatile combustible 39.98 



Fixed carbon 48.80 



Ash 5.70 



Moisture 5.74 



Sulphur 0.66 



21 H. D. McCaskey, Bull. P. I., Hin. Bur. (1903), 2, No. 3. 



22 P. L. Stangl, Ibid. (1903). 



^Asbestos and Manganese Deposits, This Journal, See. A (1907), 2, 145. 

 24 Smith, W. D.: The Coal Deposits of Batan Island. Bull. P. I., Min. Bur. 

 (1905), 3, No. 5. 



