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           | DescriptionDikes-large.jpg | 
           
             Shiprock, New Mexico a volcanic neck in the distance, with radiating dike on its south side. 
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           | Date | 
           
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           | Source | 
           USGS Digital Data Series | 
          
          
           | Author | 
           User  Vsmith on  en.wikipedia | 
          
          
           Permission ( Reusing this file) | 
           
            
             
              | Public domainPublic domainfalsefalse | 
              
             
            
             
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              This image is in the  public domain because it contains materials that originally came from the  United States Geological Survey, an agency of the  United States Department of the Interior. For more information, see  the official USGS copyright policy. 
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