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MB111
Marble Bar Chert slab polished on one side .
Dimensions at widest points approximately 135 mm x 120 mm x 9.5 mm thick.
Weighs 369 grams.
Marble Bar chert is a finely banded, iron-rich silica rock from the Marble Bar Chert Member (Warrawoona Group) of Western Australia. Formed in shallow Archean seas, it dates to the Paleoarchean (~3.46 billion years old), making it one of the Earth’s oldest well-preserved sedimentary rocks.
From near the town of Marble Bar in Western Australia.
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