GEOLOGIC RECONNAISSANCE OF MINDANAO AND SULU: 



II. PHYSIOGRAPHY. 



By Waeeea t D. Smith. 

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



CONTENTS. 

 Physiography. 



A. Plains. 



B. Pavers. 



C. Intermediate uplands. 



D. Cordilleras.. 



E. Minor types. 



1. Lakes. 



2. Coral reefs. 



3. Terraces. 



4. Volcanoes. 



5. Atolls, crater lakes, etc. 



In taking up the second chapter in the Reconnaissance of Mindanao and 

 Sulu, I am fully aware of the limited amount of our present knowledge 

 of that vast territory. Much of this information is scattered and can be 

 found only in old libraries. For instance, one very important contribution 

 by Abella 1 on the Misamis placer fields I am sure has never been seen 

 by many English-speaking people for the reason that it is published in 

 a bulletin of the Commission of the Geological Map of Spain. Similarly, 

 important notes on the Agusan Elver region are to be found as a part of 

 a report made by M. Montano to the Department of Public Instruction 

 of France. 2 The observations of our own party are also necessarily very 

 fragmentary owing to the very unsettled state of the country. In the 

 following paper I shall discuss the territory in question, from a physi- 

 ographic point of view solely. Part III will take up the geology and 

 mineral resources. 



1 Abella y Casariego, E. Memoria acerca de los Criaderos Auriferos del Se- 

 gundo Distrito del Departamento de Mindanao. Bol. Del, Mapa Geol. de Espafia 

 (1877), 6. 



2 Montano, J. Une Mission aux les Isles Philippines. Eapport a M. Le 

 Ministere de L'Instruction Publique de France (1879-1881). 



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