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Cover photo info
- Photo title: Circles in Tumblagooda sandstone, made by bacterial colonies. Kalbarri, Western Australia
- Author: Hanswis183
- Cover photo description:
- Circles in Tumblagooda sandstone, made by bacterial colonies living in river sand deposited 400 million years ago. The bacteria 'mined' red iron from the sand and concentrated it in a dark centre. The surrounding 'halo' is white because of this iron removal. Kalbarri, Western Australia
- Image ID:307052864
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Keywords for Facebook, Twitter and LinkedIn timeline photos
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