Fossil stromatolite , polished on one side with natural weathered exterior on rear.
Huge museum quality specimen !
Alcheringa narrina from the Archaean Meentheena Member within the Tumbiana Formation.
Age is approx. 2.7 billion years.
From near Nullagine in Western Australia.
Dimensions at widest points approx. 370 mm x 280 mm x 50 mm thick.
Weighs 10,114 grams.