Stromatolitic Dolomite SD157 polished magneprase From near Nullagine

From near Nullagine

Weighs 249 grams

cut and polished  on one side

Dimensions approximately 220mm x 115mm x 4-10mm thick

Dimensions at widest points approximately 225 mm x 80 mm x 14 mm thick

Stromatolitic Dolomite SD157 polished magneprase From near NullagineSD157 Stromatolitic Dolomite slab, 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 130mm x 100mm x 7mm thick