Stromatolitic Dolomite SD154 dolomite Tumble polished Mookaite

Tumble polished Mookaite

Measures approximately 215mm x 130mm and  8mm thick

220 mm x 160 mm x 10 mm thick

70 million years (Cretaceous)

115 mm x 50 mm x 15 mm thick at widest points

Stromatolitic Dolomite SD154 dolomite Tumble polished MookaiteSD154 Stromatolitic Dolomite rough rock, cut and polished on one side. Sections consist of a chaotic mixture of dolomite and or stromatolite fragments set in a matrix of mudstone and or coarsely crystalline dolomite . The pink and red colouration can be attributed to the presence of finely disseminated iron oxides . It often contain layers and nodules of red chert. From the Irregully Formation, Western Australia. Dimensions approximately 170mm x 45mm