Ch. 5— Mining and At-Sea Processing Technologies • 201 



Figure 5-20.— Nome, Alaska Placer Gold District 



165°30' 



■XP' 



Cape Nome 



60'^--. 



X Mined gold 

 placers 



30' water 

 depth 



5 miles 





 100 



^ 200 

 £ 300 





 Q 



400 

 500 

 600 



Anvil 

 Peak 



Fourth 

 beach 

 Third beach 

 IVIonroevilie beach 



Intermediate beach 



Explanation 



Q Alluvium H Glacial drift [Zl Beach sediments S Marine silt and clay 



El Stratified rocl<s of unknown type ^ Bedrock 



Generalized geologic profile of Nome beaches. 



SOURCE: Adapted from E.H. Cobbs, U.S. Geological Survey Bulletin 1374. 



