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Ordovician, circular


Dimitar

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Hello guys! I would like to hear your oppinion on these circles. I was suspecting for amonites, but it could be just a Bryozoa.

 

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Edited by Dimitar
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Yes, bryozoa seems likely. There are no ammonites in the Ordovician.

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...How to Philosophize with a Hammer

 

 

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These all look like bryozoans. Also, there were no ammonoids in the Ordovician. They did not appear until much later in the Devonian. There are curved nautiloids, but they are not ammonoids.

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