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Rocky Stoner

Echinoid coral ?

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Rocky Stoner

Hi folks, 1 item here for ID.

It is a beautiful half bagel shape with the surface made up of  polygons. A portion of a smaller one to the side.

I searched it a bit and determined Echinoid coral, but found no illustrations resembling this one.

I wetted it slightly for the pic to enhance the details.

Please verify.

Thanks.

 

 

IMG_9678.JPG

IMG_9677.JPG

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PFOOLEY

That is cool...maybe a pine cone. :o

 

EDIT: No, not a pine cone. :P

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TqB
2 minutes ago, FossilDAWG said:

It's an internal mold of a crinoid calyx.  Nice fossil!!  You can see the little "nipple" where the stem attached to the calyx.

 

Don

 

I agree, you just beat me to it. :) There are two there...

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PFOOLEY
3 hours ago, Rocky Stoner said:

Please delete this post...

 

Please do not... there is learning taking place. :)

 

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abyssunder

Pretty nice calyces internal molds sorrounded by columnal facet and column segment imprints! I like them!  :)

 

No matter if the poligons (plates) are pentagons, hexagons or heptagons, the attachment of the calyx  to the column should have an intersection with the axial canal (lumen).  In the case above there is a pentagonal infill of the lumen, considering that we are dealing with an internal mold of a calyx, not with the real calyx which is eroded away.

Edited by abyssunder

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Rocky Stoner
3 hours ago, PFOOLEY said:

 

Please do not... there is learning taking place. :)

 

Hi PFOOLEY,

FYI, I was just referring to that particular post, not the topic.

There was nothing to learn from my comments in that post having misunderstood the illustrations.

Kind regards,

:)

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