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Natural rough back
From the Miraflores Formation
DO153 Dendritic Opal rough rock
Weighs 230 grams
Sections consist of a chaotic mixture of dolomite and/or stromatolite fragments set in a matrix of mudstone and/or coarsely crystalline dolomite
Polished fossil stromatolite slab. Domal from Irregully formation IRR129 Irregully formation Natural rough backIRR 129 Fossil stromatolite slab, polished on one side. From the Proterozoic "Irregully Formation", age approx. 1. 1 billion years. Not formally identified but possibly Paniscollenia. Dimensions at widest points approximately 180 mm x 90 mm x 11 mm thick. It weighs 368 grams..
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