More Illinois Specimens

[Chedda]

 I am unsure where they originated from. But the 2nd one was found in my gravel area. The 2nd one reminded me of the favosite coral, but it is not as similar when I compared them.

 

 

[Ludwigia]

Can you please try to post sharper photos of the first one. It appears to be fossil, but I can't quite make out what. I think the 2nd one is just an extremely weathered rock, at the most something with boreholes in it.

[Thomas.Dodson]

Is it possible to get up close photos of the round portions of the first specimen? It resembles Syringopora coral specimens which are often found in Illinois but a close up will help determine. I think the second specimen is geologic in origin.

[Chedda]

1 hour ago, Ludwigia said:

Can you please try to post sharper photos of the first one. It appears to be fossil, but I can't quite make out what. I think the 2nd one is just an extremely weathered rock, at the most something with boreholes in it.

 

[Chedda]

59 minutes ago, Thomas.Dodson said:

Is it possible to get up close photos of the round portions of the first specimen? It resembles Syringopora coral specimens which are often found in Illinois but a close up will help determine. I think the second specimen is geologic in origin.

 

[Rockwood]

Crinoid cirri or feeding arms.

[Chedda]

2 hours ago, Rockwood said:

Crinoid cirri or feeding arms.

Thank you

[Tidgy's Dad]

I think it's a tabulate phaceloid coral, such as Syringopora as @Thomas.Dodson suggested. 

[Rockwood]

15 minutes ago, Tidgy's Dad said:

I think it's a tabulate phaceloid coral, such as Syringopora as @Thomas.Dodson suggested. 

With a small hole in the center and annular rings of smaller holes along the outside ? Where are the tabulae ? Where are the bridging structures ? 

 

[Tidgy's Dad]

1 hour ago, Rockwood said:

With a small hole in the center and annular rings of smaller holes along the outside ? Where are the tabulae ? Where are the bridging structures ? 

 

The small holes in the centre are the individual corallites, the 'annular rings of smaller holes' are either damage or where the horizontal connecting canals linked the vertical corallites and the tabulae in syringoporids are rarely obvious, though some slight bulges in the sides of the one vertical piece we can see probably indicate their location.

[FossilDAWG]

I'm on board with Syringopora.

 

Don