Mazon Creek Plant Set : Neuropteris/Pecopteris etc (Some Pos/Neg and some studypartials)
Middle Pennsylvanian (Carboniferous), Francis Creek Shale, Braidwood, Illinois. USA
A set of plant fossils from the famous Mazon Creek bed nodule deposits. These nodules are split open to reveal a world from 309 Million years ago.
These are an affordable way of getting a lot of different plant specimens and examples of the same species.