Perry and Jackson Counties
Near DuQuoin and Murphysboro, a variety of well preserved plant fossils has been collected from shales overlying both the Herrin (No. 6) Coal and the Murphysboro Coal. Nearly all have come from shaft mines that are not easily accessible to the collector.
One currently good outcrop locality for collecting plant fossils from the shale above the Murphysboro Coal is just southeast of Murphysboro.