Polished fossil Oncolite slab. ONC116 toredo Big palm stone

Big palm stone

Weighs 585 grams

One edge slightly unpolished

Dimensions at widest points approximately 225 mm x  120 mm x 10 mm thick

cut and polished on one side with a rough naturally weathered back

Polished fossil Oncolite slab. ONC116 toredo Big palm stoneONC116. 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. 105 mm x 85 mm x 7 mm thick. Weighs 134 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