Polished fossil stromatolite. Pilbaria sp. PSP105.

PSP105.   Fossil stromatolite slab, polished on one side.

Pilbaria sp. from the Proterozoic "Duck Creek Dolomite".  

Age is approx. 2 billion years.

From near Paraburdoo in Western Australia.

At widest points approx.  210 mm x 150 mm x 9 mm thick .

Weighs 588 grams.