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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
4 mm thick
45 Ga): a high-silica lava showing striking radial spherulite textures formed as the original volcanic material crystallized
Weighs: 221 grams
Weight is 192 grams
Dimensions at widest points approximately 125 mm x 120 mm x 80 mm thick
Polished Marble Bar Chert slab MB101 dendritic opal 4 mm thickMB101 Marble Bar Chert slab, polished on one side. Dimensions at widest points approximately 130 mm x 60 mm x 9. 8 mm thick. Weighs 170 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 Earths oldest well preserved sedimentary rocks. From near the town of