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           | Description | 
           Aa channel flow from Mauna Loa.jpg Aa lava flow from Mauna Loa during its 1984 eruption. 
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           | Date | 
           28 March 1984 | 
          
          
           | Source | 
            http://hvo.wr.usgs.gov/gallery/maunaloa/1984/2441061_caption.html | 
          
          
           | Author | 
           Photo by R.W. Decker. | 
          
         
         
         Licensing 
        
         
          | 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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