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Recker

Curious about this odd Grewingkia

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Recker

I'm really curious about this odd looking Grewingkia I found yesterday in the gravel beds of the Whitewater River in Franklin County Indiana.  I've found quite a few, all clean of any substrate, many on top of the ground.  Yesterday I found this one just about 10" below the surface of the gravel.  Most of the horn coral has linear lines, but this one seems to be segmented unlike the others.  Is it older or what causes the difference in this on compared to the others?  I appreciate all of your help!

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Fossildude19

The two others in the last picture look extremely water worn/tumbled/polished. 

The outer layers have been eroded away.  ;) 

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Recker

Thank you, that makes sense!!!  So the two would have looked like the middle one without being eroded by sand and water.  I'm excited to find out, thank you so much!!!

 

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