Table 1 



U.S. AND WORLD LAND RESERVES AND RESOURCES OF SOME METALS AND NONMETALS 



THAT MAY OCCUR IN THE CONTINENTAL SHELVES 



Source: Compiled by Geological Survey commodity geologists. 



Minable reserves are materials that may or may not be completely explored but that may be quantitatively estimated 

 and are considered to be economically exploitable at the time of the estimate. 



Resources are materials other than reserves that are prospectively usable and include undiscovered recoverable re- 

 sources as well as those whose exploitation requires more favorable economic or technologic conditions. 



Unknown. 

 4 

 Demand figures include a significant quantity of recycled metal. 



VlI-99 



