What do you think?
I was digging in a pile of stones that were dumped in a low drainage area behind a business. Consequently I don’t know the origin, but I presume they are from the Missouri region. There were a lot of coral and clam fossils in the pile.
The rock pictured has an imprint that looks like some sort of annelid. At first I thought crinoid, but I’ve never seen a crinoid impression like this.