Polished fossil stromatolite slab. Alcheringa narrina. ALC158 peanut Dimensions at widest points approximately

Dimensions at widest points approximately 170 mm  x 100 mm x 33 mm thick

90 mm x 75 mm x 9 mm thick

Dimensions at widest points approximately 140 mm  x 90 mm wide x 8 mm thick

190 mm x 95 mm x 70 mm thick

Dimensions at widest points approximately  120 mm x 70 mm x 7 mm thick

Polished fossil stromatolite slab. Alcheringa narrina. ALC158 peanut Dimensions at widest points approximatelyALC158 Fossil stromatolite slab, polished on one side. 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. 160 mm x 90 mm x 17 mm thick. Weighs 493 grams.