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Description
Porphyry is a general term that is used rather loosely for igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass
Weighs 164 grams
Weighs 546 grams
Location is near the town of Wiluna
Polished fossil stromatolite. Carawine Dolomite CD102 dendritic opal Porphyry is a general termCD102 Fossil stromatolite, polished on one side with natural weathered exterior. Dimensions at widest points approx. 180 mm x 100 mm x 35 mm thick. Weighs 984 grams. The "Carawine Dolomite" is a geological formation that occurs in numerous isolated areas in the eastern part of the Hamersley Basin in the Pilbara region of Western Australia. It contains numerous occurrences of stromatolites and oncolites with an age of between 2. 5 to 2. 6 billion years.
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