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Stromatolite or stromatolith


Layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilm of microorganisms, especially cyanobacteria ( commonly known as blue-green algae) Stromatolites provide the most ancient records of life on earth by fossil remains which date from more than 3.5 billion years ago.


Hamelin Pool near Kalbarri WA. Shallow water.

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Western Australia, Australia

Spotted on Aug 8, 2003
Submitted on Jun 8, 2013

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