INTRODUCTION 



The purpose of this report is to describe photographic 

 samplings of very small bottom-relief features found at dif- 

 ferent depths in the ocean and in different environments; 

 and to show how photographic and related information from 

 the surfaces of intermediate topographic features can be 

 interpreted to predict the general nature of the microrelief 

 and project microrelief characteristics from area to area. 

 Approximately 700 bottom photographs of the surfaces of 

 selected underwater features in the Pacific, Indian, and 

 Arctic Oceans, and in the Gulf of California, have made 

 this study and analysis possible. 



