07349 - Beautiful 1.06 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Urchins Beautiful cranial dermal plate of
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Description
Beautiful cranial dermal plate of an indeterminate crocodile from the Upper Cretaceous
Do not possess any type of restoration or repair
— Les vertébrés fossiles des gisements de phosphates (Maroc – Algérie – Tunisie)
Symphysops sp: Fossilworks (Paleobiology Database)
deep-water
07349 - Beautiful 1.06 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Urchins Beautiful cranial dermal plate ofChaledonized gastropods (specimen at fat left is 3. 0 cm tall) these snail shells have been replaced by translucent, fibrous, microcrystalline quartz (SiO2).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.