Polished fossil stromatolite. Alcheringa narrina. ALC156 stand ups 160 mm x 130 mm

160 mm x 130 mm x 7 mm thick

Rare mini marshmallows in this one :)

It weighs 265grams

180 mm x 105 mm x 40 mm thick

The quartz epidote axinite mineralisation was evidently caused by hydrothermal activity related to the doleritic sills which are in close proximity to the occurrence

Polished fossil stromatolite. Alcheringa narrina. ALC156 stand ups 160 mm x 130 mmALC156 Fossil stromatolite , polished on one side with natural weathered exterior on rear. 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. 300 mm x 205 mm x 50 mm thick. Weighs 4,730 grams.