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Seven-sided crinoid stem?


kgbudge

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This is an enlargment of a photograph I took a while back, where only later did I spot the odd fossil. Apologies for the low quality. I'm curious about the star-shaped object with seven corners.

 

This is from the Madera Group in the Jemez Mountains of New Mexico, which is a Pennsylvanian carbonate shelf formation with abundant crinoids, brachiopods, and bryozoans.

 

I've heard of star-shaped crinoid stem segments with five points, but not seven before. Any ideas?

 

weird_star_fossil__close.jpg

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I think, the possibilities could be a crinoid columnal with spines or a bryozoan like Evactinopora.

Please wait other opinions.

Edited by abyssunder
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2 hours ago, abyssunder said:

I think, the possibilities could be a crinoid columnal with spines or a bryozoan like Evactinopora.

Please wait other opinions.

 

Could be Evactinopora. Thanks.

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