Please help ID - fossil from Ordovician

[i-rock]

Hello everybody. I would very much appreciate your opinion on a fossil you can see on the picture. It's from Tennessee - Ordovician - Chickamauga group. Thanks.

 

[i-rock]

Another one to identify from the same site..

[i-rock]

and one more..

Edited November 30, 2016 by i-rock

[Fossildude19]

Here's what I'm seeing: 

 

 

Oh!

And Welcome to the Forum.  

Regards,

[Fossildude19]

Your first item may be some sort of trace fossil or ichnofossil. 

 

 

 

Regards,

[i-rock]

Thanks Tim! I really hoped the 1st one could be some kind of sea scorpion / Eurypterid-type creature. It did look like a head to me and missing most of the body. Oh, well.. still looks unusual.

 

And here are some more fossils from the same site.

 

[Fossildude19]

Gastropods, brachiopods, and cephalopods in cross section, mostly.  

Nice mortality plate of brachiopods, bottom center.  

Top center snail and top right cephalopod are very cool, too. 

Regards,

[Fossildude19]

4 minutes ago, i-rock said:

Thanks Tim! I really hoped the 1st one could be some kind of sea scorpion / Eurypterid-type creature. It did look like a head to me and missing most of the body. Oh, well.. still looks unusual.

 

 

I can kinda see where you might get that, but Eurypterids very rarely preserve so 3 dimensionally. If they do, it is usually in light relief - not so inflated.  

 

[i-rock]

Thanks, Tim. Yes, I couldn't find pictures of any 3d fossils of Eurypterids in the internet. And size might be wrong too.. Well, will be keep looking for more cool fossils when we hike there next time. That trail is awesome, you literally step on fossils.. just what is needed for such a newbie fossil hunter as myself.. And I do appreciate your responses.

[abyssunder]

I see the same as Tim. The first one is likely an ichnofossil.

[Rockwood]

12 hours ago, Fossildude19 said:

Your first item may be some sort of trace fossil or ichnofossil. 

 

 

 

Regards,

I have to cautiously disagree on this one. Based on the density of fossils in the rest of the posts and the apparent 'limieness' of the matrix my gut feeling is that it's a body fossil, perhaps the base of a larger bryozoan colony.   

[i-rock]

Thanks to all of you guys for your help. Here is a "front view" of the first item. Dimensions 9.5cm x 6 cm.

[erose]

I also think you have a massive bryozoan colony. Does the surface show tightly packed small holes? And by small I mean pin holes, less than half a milimeter. Tiny.