Ordovician
Galena Formation: Stewartville or Prosser member
Fillmore County, MN
For Scale
Rock Rock for scale
Trilos for comparison:
Raggedy Man and Laura are over here hunting this weekend and I was showing them this interesting rock I found with lots of crinoid stems and parts that I picked up a couple of days ago.
Any idea on what species of trilo this is?
Thanks for looking!