07345 - Beautiful 1.02 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Neltneria The exact taxonomic classification is
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Description
The exact taxonomic classification is complex given that there are very few published studies that refer to the claw rests of the Pterosaurs in the North African Upper Cretaceous
Woodward 1901 and Woodward 1902
fluvial-lacustrine
No fractures or restoration
Part of the digestive system is preserved and visible
07345 - Beautiful 1.02 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Neltneria The exact taxonomic classification isChaledonized gastropods (specimen at fat left is 3. 0 cm tall) these snail shells have been replaced by translucent, fibrous, microcrystalline quartz (SiO2). This variety of quarz is called chalcedony. Chalcedonization is a variety of silicification. Chalcedonized fossils are uncommon.
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