(approx 1/2")
While flaking split layer material, this appeared. I set it aside with a couple of other fish scales. Upon closer inspection, it seemed to have roots so I changed my thinking to "floating plant".
This morning, I looked up plants in my new book "Lost World of Fossil Lake". The roots in the book just dangle down into the water. Makes sense. Mine has a connected pattern.
What say you, Wyoming hunters?