IRR101 Fossil stromatolite rock, cut and polished on one side. Has a flatish base, so stands easy leaning slightly back. Great specimen.
A domal stromatolite from the Proterozoic "Irregully Formation" in Western Australia.
Yet to be formally identified.
Age is approx. 1.1 billion years.
Specimen measures approx. 195mm x 85mm, 30-55mm thick.
It weighs 1,880grams.