@chase-grim I think this is a tabulate coral like Favosites. Maybe not Favosites specifically but similar.

Hi @chase-grim. I can see why you might think this is Lepidodendron. However, I’ve never seen one this small. I think @smudge-smith is right in that this is probably a sponge.

Hi @chase-grim
From your photo, it looks like this fossil is inside a rounded stone. And since it was found in a creek, there is no reason to think this fossil is really Ordovician or Silurian. The fact that it was found north-east of Dayton, OH tells me if it were found in the strata, it would probably be Silurian. But the stone could have come…[Read more]

@chase-grim so looking at macrostrat.org it looks like that area is Ordovician-Silurian in age meaning it not likely a plant since we don’t see a lot of land plants until the Devonian. My guess would be an animal (or animal colony) like graptolite, bryozoan or even some sort of echinoderm since they too can have branching appendages. I’m going to…[Read more]

Hi @chase-grim! Usually when I think of Ohio I think of marine deposits so animals that come to mind are bryozoans and graptolites but I don’t think any of those have zooids shaped like that or branch 3-ways (see center right of fossil). I could be mistaken as these fall out of my field of expertise. However, there is terrestrial input in marine…[Read more]