Not sure about this one?

[Kirsten]

Hi there, this is was found on rock wall at a private residence. The rocks came from a farm in north east Ohio. Haven't found anything that looks like it....thankyou!

[FranzBernhard]

Welcome to TFF from Austria!

 

What a nice, naturally sectioned specimen! Thanks for sharing.
This is a longitudinal section of an orthoconic nautiloid (orthocerid), a cephalopod, quite well preserved. You can see the septa (dividing walls) and the narrow "pipe" in the middle. This is the siphuncle. Local member can give a hint to formation and age.

 

28 minutes ago, Kirsten said:

this is was found on rock wall at a private residence.

Wall still mostly intact? 

 

Franz Bernhard

[Kirsten]

Hi Franz, thankyou so much for your identification. I'll be looking online now for more examples of these. The wall is kind of flat. It's an edging around a large pond, so no rubble with the rock removal;)