Polished fossil stromatolite slab. Asperia digitata YD117 John asperia ashburtonia 5") Each piece approximately 3

5") Each piece approximately 3 - 4 cm at widest points

230 mm x 130 mm  x 10

Dimensions at widest points approximately 150 mm  x 70 mm x 10 mm thick

Dimensions approximately 160 mm x 130 mm x 90 mm thick

80 mm x 80 mm x 35 mm thick

Polished fossil stromatolite slab. Asperia digitata YD117 John asperia ashburtonia 5") Each piece approximately 3YD117. Fossil stromatolite slab polished on one side. Asperia digitata (formerly Yelma digitata) from the Proterozoic "Yelma Formation". Age is approx. 1. 7 billion years. From near Wiluna in Western Australia. Dimensions approx. 305 mm x 170 mm x 12. 5 mm thick. Weighs 1,688 grams.