ASP142. Fossil stromatolite slab, polished on one side.
Asperia ashburtonia from the Proterozoic "Duck Creek Dolomite".
Unusual colouration caused by natural iron oxide weathering.
Age is approx. 2 billion years.
From near Paraburdoo in Western Australia.
Approx. 160mm x 90mm, 7mm thick. It weighs 205 grams.
