Iowa Finds/Rugose Horn Coral & Brachiopod?

[Jarl]

Hello,

I found the following in Eastern Iowa, more East Central really on the banks of the Cedar River. The area is Silurian/Devonian-aged in finds. I'm not sure what exact species of horn coral this is. The other I think is a brachiopod, then again, maybe not, I'm sure someone else in here should know. There was a similar specimen in my Audobon guide, but I don't remember what it was at this time. Both fossils were very encrusted and I managed to clean them fairly well without destroying them.

[Cecilia]

Yes, I think rugosa horn. Look at this incredible site if wanna take 3-D tour inside:

https://www.digitalatlasofancientlif...thozoa/rugosa/

But, think the big, flat button object may be concretion.

[Jarl]

Thanks, that's a great link you posted.

[Cecilia]

I would post some pics concretions look like your second item, for some reason, can’t. Maybe tomorrow issue resolve itself, and can show you why I think that’s what it is.