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4-H Geology ID question


Mari

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Hello Everyone. My grandaughter is in 4-H Geology and we found this specimen in Southwest Kansas. We have no idea what it is or how to label it for her exhibit box. Any help you could give us would be greatly appreciated.

 

Thank you!

fossil 1.jpg

fossil 2.jpg

fossil 3.jpg

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Some sort of oyster.

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Perhaps fragment of Gryphaea mucronata, known from the Cret. of Texas through Kansas. I see some places on the internet referencing it as Texigryphaea mucronata, but I cannot see some form of consensus - GBIF lists it as G. mucronata, so I'm going with that! :D

Gryphaea mucronata Gabb, 1869 (gbif.org)

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PBDB also lists it as G. m. Gryphaea mucronata | PBDB (paleobiodb.org)

~ Isaac; www.isaactfm.com 

 

"Don't move! He can't see us if we don't move!" - Alan Grant

 

Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry.

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This is most likely to be a fragment of a Pennsylvanian aged Myalina species bivalve.  The second photo shows the distinctive pattern of the hinge interior.

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31 minutes ago, JohnJ said:

This is most likely to be a fragment of a Pennsylvanian aged Myalina species bivalve.  The second photo shows the distinctive pattern of the hinge interior.

 

That seems a better fit than a gyra, cheers!

~ Isaac; www.isaactfm.com 

 

"Don't move! He can't see us if we don't move!" - Alan Grant

 

Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry.

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11 hours ago, JohnJ said:

This is most likely to be a fragment of a Pennsylvanian aged Myalina species bivalve.  The second photo shows the distinctive pattern of the hinge interior.


Likely. We need a better locality for this; probably Pennsylvanian/Permian.

 

Here is great shot of the very distinctive underside of the hinge from an inactive Forum member.

http://inyo2.coffeecup.com/kansasfossils/pelecypods6.html

A52FBFB1-88C3-4D3B-96ED-EF3A24B5E637.jpeg

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