taken 9 years ago, near to Dłn Chonnuill (castle) [antiquity (non-Roman)], Argyll And Bute, Great Britain
Stromatolite
Stromatolites are formed by microbes which deposit carbonate minerals in thin layers over hundreds of years, gradually growing into dome-shaped structures with a layered interior. This one is over 720 million years old, and has been broken open by weathering so that its internal strcuture can be seen.
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Automatic Clusters:
· Grow [2]
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