Hi, @Tom-skimina – There are some discrepancies in your geologic context data. The Borden is a Mississippian formation but you indicate Ordovician in your timeline. Could you narrow down the location a bit so we can figure this out?
You can use this mapping program to figure out the age and rock in your area:…[Read more]

Hi, @tom-skimina – I am a little confused by your information. First, what do you think this fossil is? It doesn’t look like anything specific to me.

Second, if you are in Lawrence, Indiana the rock could be a few different things – Devonian or Silurian primarily. You suggest Ordovician in the geochronology but then Borden formation, which is…[Read more]

Hi, @tom-skimina, I agree with @sadie-mills and your geochronology and lithostratigraphic information are at odds. The Borden is a formation in the Mississippian not the Ordovician.