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Tennessees Pride

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Tennessees Pride

These are pics sent to me by my cousin who was running a dozer and uncovered this fossil. There are Silurian and Devonian limestones in his area. I have also read that first Sea Cucumbers made their appearance in the Devonian. So I told him my best "guess" was "the fossilized endoskeleton remains of a probable Devonian time period Sea Cucumber"... I'm very unsure because those periods aren't my main study. Did I say wrong?

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Really nice find!

I'm with Don...

Here's a link that explains the anatomy of these crinoids:http://echinoblog.blogspot.pt/2010/02/giant-floaty-swimmy-fossil-crinoids.html.

Great link to info. Thanks ! I think it explains some of the polygon shapes that I have found in voids that seemed to be associated with crinoids but didn't quite look like a calyx.

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Really nice find!

I'm with Don...

Here's a link that explains the anatomy of these crinoids:http://echinoblog.blogspot.pt/2010/02/giant-floaty-swimmy-fossil-crinoids.html.

Something about crinoids always intrigue me. Never heard of a float for a crinoid before. It did not make sense when I saw this because the float would be above the arms of a crinoid and they are up in the water column to begin with. My research came up with the same info as Guguita found. It explains very well many odd types of crinoids that exist. For those that do not know about this type of crinoid and don't want to research further, here is a simple synopsis: This was a floating crinoid, unattached to the sea floor. Its float suspended the crinoid. The currents would move it, dragging the fan through the water column thus allowing it's fan it feed!!! Incredible find!!! My only question is if this is a floating device, HOW DOES IT FOSSILIZE??
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... if this is a floating device, HOW DOES IT FOSSILIZE??

Presumably after death, when eventually stops floating. It begs the question whether floating crinoids maintained the buoyancy of there floats with some sort of gas exchange?

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Commonly the Loboliths have multiple lobes which are not visible in the specimen in question. I'm not saying it couldn't be that, but a section through the middle may reveal or not the chambers of the internal structure. Whatever it is, I think it would be more interesting to cut it half.

Fossil Crinoids - Hans Hess et al. http://catdir.loc.go...34/98011645.pdf
On the Crinoid Genus Schyphocrinus And its Bulbous Root Camarocrinus - Frank Springer https://ia700809.us....nussc00spri.pdf

Edited by abyssunder
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