Fern fossil, from Mason Creek, Illinois


Mason Creek locality to be sure, …but this specimen coming to me resulted from casual conversation with a fellow passenger on a flight back east in the mid-1980s.  We got talking about geology, and it turns out he was a rock hound and had collection of Mason Creek specimens.  He sent me this fossil a few weeks later!  I love it.   Who wouldn’t?

Age & Formation
Pennsylvanian, ~310 Ma.