250 



CONCLUSIONS 



Areas having particular potential for construction sand, phosphorite, manga' 

 nese nodules, and petroleum have been outlined in a general way (fig. 1) from 

 preliminary results of a continuing study of the Atlantic continental margin. 

 Further planned investigation should pinpoint the best parts of these areas 

 for such resources. Whether any of them will eventually be exploited depends 

 upon future developments in marine engineering and a favorable cost-price 

 relation. 



