
            
            By: magic-gigapans
            
              Image: Robin Rohrback, Mid-Atlantic Geo-Image Collection
                
            
            
              License:
                 Creative Commons Non Commercial ⧉
              
            
          
            Uploaded: 4 May 2020
            Last Updated: 26 Jun 2020
          
              169 megapixels
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Seafloor barite in cap dolostone in upper Ravensthroat Formation from northwest Canada. Sample is 5 cm across at its widest point and 15 mm across at its narrowest point. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard University; Eugene Domack, Hamilton College; and Timothy Fox, Hamilton College. For more information on the Snowball Earth Educational Rock Sample Suite, visit http://www.snowballearth.org/samples.html