
            
            By: magic-gigapans
            
            
            
              License:
                 Creative Commons Non Commercial ⧉
              
            
          
            Uploaded: 29 Jun 2020
            Last Updated: 29 Jun 2020
          
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This sedimentary structure is preserved in rock that is nearly two billion years old. Tilted during the Penokean Orogeny, these rocks are also some of the oldest redbeds (evidence of an atmosphere with free oxygen) in the world.