
            
            By: magic-gigapans
            
              Image: Alan Pitts, Mid-Atlantic Geo-Image Collection
                
            
            
              License:
                 Creative Commons Non Commercial ⧉
              
            
          
            Uploaded: 14 May 2020
            Last Updated: 8 Jun 2020
          
              477 megapixels
            19,204 x 24,820 pixels
            64.0 in X 82.7 in at 300dpi
            
          
This beautiful mound of travertine is located in the streambed of Tumbling Run, south of Strasburg, Virginia. Tumbling Run is depositing this travertine (or tufa) along the banks and streambed and has incised down into its own travertine deposits. This exposure is really bulbous and the smooth rounded faces look more to me like travertine exposed in caves rather than travertine deposited in streams. The calcareous bedrock, which Tumbling Run flows across, is the source of the calcium carbonate, which is then deposited in the stream. This image was created as part of the MAGIC project (Mid Atlantic Geo Imagery Collection).