Polished fossil stromatolite. Alcheringa narrina. ALC161 polished noreena 70 mm x 45 mm

70 mm x 45 mm  x 9

145 mm x 90 mm x 9 mm

Dimensions at widest points approximately 135 mm x 140 mm x 80 mm thick

Dimensions at widest points approximately 180 mm  x 110 mm x 9 mm thick

The interesting cylindrical cavity on the right hand side is all that remains of a fossil belemnite which was a squid-like creature with a tapering torpedo or bullet shaped body

Polished fossil stromatolite. Alcheringa narrina. ALC161 polished noreena 70 mm x 45 mmALC160 Fossil stromatolite , polished on one side with natural weathered exterior on rear. 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. 135 mm x 80 mm x 40 mm thick. Weighs 584 grams.