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MB102
Marble Bar Chert slab, polished on one side.
Dimensions at widest points approximately 130 mm x 100 mm x 8.6 mm thick.
Weighs 248 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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