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It weighs 85 grams
Sections consist of a chaotic mixture of dolomite and/or stromatolite fragments set in a matrix of mudstone and/or coarsely crystalline dolomite
Face is approximately 75 mm x 60 mm and 10 mm thick
PA220 An Agate slab
Weighs 144 grams
Polished fossil stromatolite. Pseudogymnosolenid type. DOG164 pilbara agate It weighs 85 gramsDOG164 Fossil stromatolite slab, polished on one side An as yet unidentified stromatolite, form of Pseudogymnosolenid type. The stromatolite occurs as small digitate columns which are finely laminated. It probably grew in shallow water conditions with intermittent subaerial exposure. From an unassigned unit of the Wyloo Group. Age is approx. 1. 8 billion years. From south west of Newman Western Australia. Approx. 190 mm x 90 mm x 10 mm thick. Weighs
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