Fossil ID help

[Eastonian]

I found this fossil imprint (that's probably not the right terminology) on a rock last month in northern Michigan. It measures 2" x 2", and in places there seems to be a honeycomb pattern. What's with the tubular piece?

 

 

[Fossildude19]

I would guess that it is an cross section through a coral. Probably a Rugose coral.

There also seems to be a cross section of a shell below it, as well as the imprint of a spiriferid brachiopod below that. 

 

    

 

Regards,

[FossilDAWG]

I think it may be a worn section through a tabulate coral or a bryozoan.

 

Don

[Rockwood]

I think the re-curved edge says tabulate colony. 

[TqB]

If the fossil is 2" across, the tubes seem to be well under 1mm which suggests bryozoan, or perhaps chaetetid sponge. A bit narrow for a tabulate.

[Rockwood]

Estonian: Can you give us a better scale on it ? Perhaps a ruler in the photo.

I don't believe he has me on it this time