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21663 - Great Collection of 25 Cretaceous Pyritized Ammonites Unidentified Trilobites which is usually the only

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Description

which is usually the only thing that is preserved

The total mass of meteorite pieces recovered from the bottom of Chebarkul lake was therefore ~640 kg

Environments: offshore

Ischyrhiza

21663 - Great Collection of 25 Cretaceous Pyritized Ammonites Unidentified Trilobites which is usually the onlyPrecious lot of pyritized ammonites! Different species present! It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.

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