Polished fossil Oncolite slab. ONC112 green PA283 Pilbara Agate
Description
PA283 Pilbara Agate
OG201 Polished orbicular granite slab
(Dragon stone)
cut and polished on one side with a natural weathered back
Polished fossil Oncolite slab. ONC112 green PA283 Pilbara AgateONC112. 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
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