Polished fossil Oncolite slab. ONC112 microbialite Dimensions at widest points approximately

Dimensions at widest points approximately 150 mm x 150 mm x 85 mm thick

Dimensions approximately 130 mm x 100 mm x 50 mm thick

no thicker than 250mm that cross cuts the Weeli Wolli formation

Weighs 612 grams

Polished fossil Oncolite slab. ONC112 microbialite Dimensions at widest points approximatelyONC112. Fossil Oncolite polished slab. From the Miocene "Trealla Limestone" north of Carnarvon, Western Australia . Age is approx. 15 million years. Dimensions at widest points approx. 145 mm x 105 mm x 8 mm thick. Weighs 285 grams. Oncolite is a limestone composed largely of oncoidsrounded, coated grains that grow as thin layers of lime mud accumulate around a tiny nucleus (such as a sand grain or shell fragment) under microbial influence. Formed in