
            
            By: magic-gigapans
            
              Image: Robin Rohrback, Mid-Atlantic Geo-Image Collection
                
            
            
              License:
                 Creative Commons Non Commercial ⧉
              
            
          
            Uploaded: 12 May 2020
            Last Updated: 27 May 2020
          
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Graptolites preserved as carbon films in the Edinburg Formation, exposed in Mint Spring, VA. Callan Bentley, who collected this sample, wrote a blog post about the exposure, which you can read here: http://blogs.agu.org/mountainbeltway/2013/05/01/graptolites/ A geologic map of the site is available here: http://ngmdb.usgs.gov/ngm-bin/pdp/zui_viewer.pl?id=14871