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15th Annual Smithsonian Magazine Photo Contest Natural World
Mary Ellen jasper stromatolite

Close-up of Mary Ellen jasper, a stromatolite or fossil of blue-green algae from the Mesabi Iron Range in Northern Minnesota. This petrified fossil is over a billion years old. The colors are due to various iron compounds.

Photo Detail
Date Taken: 10.2017
Date Uploaded: 11.2017
Photo Location: Stevens Point, Wisconsin, United States of America
Camera: Canon EOS 7D
Copyright: © Douglas Moore