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TMNH

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I found this at my cottage on the beach. The fossils that wash up there are usually between Ordovician and Devonian in age (that's not very helpful is it :blush: ).

What you can't see in the photo is that one end of the specimen goes through the rock so you can see the end. It is 3-Dimensional.

I don't know what else to say...does anyone have any idea what it is? :blink:

post-3350-0-92666100-1308616925_thumb.jpg

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Appears to be an echinoderm or asteroid (sea-star).

Not sure which one as they all look similar to me! :blink:

image.png.a84de26dad44fb03836a743755df237c.png

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I'd guess a crinoid stem because it is so parallel. I think a brittle star arm would have more taper to it, but that was my first instinct. How big is it?

There's no limit to what you can accomplish when you're supposed to be doing something else

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Yay! I thought it might be an echinoderm, but I haven't had much experience with them as they're quite rare around here.

The visible portion of the fossil is about 5 cm long.

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How 'bout an end view?

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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Here's a few more pictures. The end view is circled in red. The end isn't very detailed, so I don't know how helpful it will be... <_<

If it is a crinoid stem, it's pretty different from any I've seen before. :blink:

post-3350-0-27607000-1308753716_thumb.jpg

post-3350-0-98987600-1308753719_thumb.jpg

post-3350-0-64611700-1308753723_thumb.jpg

Edited by TMNH
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I don't recall seeing any crinoids with that kind of thing happening on the column. If it's a segment of a crinoid column, is that pattern of equally spaced dots 'original' for this species, or has there been so much weathering here that they are all that's left, and there used to be more material connecting from one to the next?

Generally speaking, the material of the fossil does indeed look like it may be echinoderm of some sort.

Any chance of getting higher resolution photos in better light?

Oh........wait......what about Xenocrinus?

xenocrinus-crinoid-stem-fossil-whitewater-formation-jefferson-county-indiana-ordovician-period.jpg

related links...

http://louisvillefos...noid-stems.html

http://drydredgers.org/rons.htm

http://www1.newark.o.../Xenocrinus.htm

.

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That's a cool crinoid! Never seen one with a stem like that! :o That could be it...

I'll see what I can do about a better photo. I'm going away for a few days, so it might take me a bit to get it ;)

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very nice fossil, Iocrinus seems to have a good profile as a candidate, also. My link

"Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus

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  • 2 weeks later...
  • 2 weeks later...

I found this at my cottage on the beach. The fossils that wash up there are usually between Ordovician and Devonian in age (that's not very helpful is it :blush: ).

What you can't see in the photo is that one end of the specimen goes through the rock so you can see the end. It is 3-Dimensional.

I don't know what else to say...does anyone have any idea what it is? :blink:

I don't know too much about Ordovician stuff myself, but I'd say it looks almost like a worm or something to me, because of the segments. Another thing it might be is possibly a feeding tentacle from a crinoid or echinoderm. Or maybe some sort of a swimming animal? Just figured I'd throw some ideas out there, get people thinking.

-GeoJon

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