SPF109. Fossil stromatolite slab, polished on one side.
These are the oldest known fossils on Earth.
From the Strelley Pool Formation in the Pilbara region of Western Australia.
Age is approx. 3.4 billion years.
Dimensions approx. 260 mm x 105 mm x 10.5 mm thick.
Weighs 541 grams.
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