Polished Marble Bar Chert MB120 asperia ashburtonia Weighs 425 grams

Weighs 425 grams

Rare complete nodule

200 mm x 80 mm  x 60 mm

Dimensions at widest points approximately 330 mm  x 260 mm x 18

115 mm x 95 mm x 8

Polished Marble Bar Chert MB120 asperia ashburtonia Weighs 425 gramsMB120 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 130 mm x 60 mm x 50 mm thick. Weighs 490 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