This "river rock" came from a bag purchased at a home center in Illinois so the place it was originally found is unknowable. Can someone help me identify this, please?
It is a cylindrical impression of something with rings. In my mind's eye I'm seeing a plant stem or reed of some sort buried in mud near a stream or pond, but I'm virtually clueless about these things and would appreciate it is a more knowledgeable kind soul would offer a more informed opinion! Is it plant? Animal? Insect?
Approximate age?
Thank you!