Polished fossil stromatolite slab. Asperia ashburtonia. ASP149 striped jasper Asperia digitata (formerly Yelma digitata)

Asperia digitata (formerly Yelma digitata) from the Proterozoic "Yelma Formation"

OJ129  A rough rock

70 million years (Cretaceous)

The clinozoisite has replaced but retained the shape of plagioclase feldspar crystals

125 mm x 70 mm x 53 mm

Polished fossil stromatolite slab. Asperia ashburtonia. ASP149 striped jasper Asperia digitata (formerly Yelma digitata)ASP149. Fossil stromatolite slab, polished on one side. Asperia ashburtonia from the Proterozoic "Duck Creek Dolomite". Age is approx. 2 billion years. From near Paraburdoo in Western Australia. Dimensions at widest points approx. 150 mm x 90 mm x 6. 5 mm thick. It weighs 240 grams.