PP117. Fossil stromatolite, polished on one side with natural weathered exterior.
Pilbaria perplexa from the Proterozoic "Duck Creek Dolomite".
Age is approx. 2 billion years.
From near Paraburdoo in Western Australia.
Approx. 120 mm x 90 mm x 50 mm thick at widest points
1,055 grams.
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