Mies GEOLOGY OF LUZON; Pa. 
WARREN D. SMITH, PH.D. 
Chief of Division of Mines, Bureau of Science, Manila, Philippine Islands* 
CONTENTS 
INTRODUCTION 
PHYSIOGRAPHY 
The Coastal Plains 
The Central Plain 
The Albay Plain 
The Intermediate Uplands 
The Cordilleras 
The Rivers 
The Lakes and Swamps 
Human Response 
GEOLOGY 
General Considerations 
The Igneous Complex (Pretertiary (?) Rocks) 
The Metamorphic Rocks 
The Tertiary Sediments 
Recent Formations 
ECONOMIC 
Coal 
Tron 
Oil 
Gold 
Copper 
INTRODUCTION 
Luzon is the largest island of the Philippine group and, if not 
now, promises soon to be the most important island off the eastern 
coast of Asia. Because of its great strategic importance and 
because it is the home of the only Christianized people of Malay 
origin, it is of more than passing interest. Geologically, it is 
worthy of constant study as it is a link in that great “Circle of 
Fire” which girds the Pacific. From it, doubtless, are to be wrested 
t Published with the permission of the Director, Bureau of Science, Manila. 
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