Other Northern Illinois Localities
In addition to the counties listed above, a number of others have produced plant fossils. For example, there are records of plant fossils found southeast of Franklin in Morgan County, at Neelys in Peoria County, and at a number of places in the southern and western parts of Rock Island County. Local exploration is certain to turn up numerous other collecting places at present unknown.
Plate 5
Codonotheca ⅗× Calamostachys 1× Pachytesta ⅗× Codonospermum ⅗× Cordaicorpus ⅗× Samaropsis ½× Whittleseya 1× Trigonocorpus ¼× Holcospermum ⅗× Neuropterocarpus ⅗× Lepidostrobus ⅗× Carpolithes ⅗×
Southern Illinois
Lawrence County
Near the Lawrence-Richland county line, not far from the towns of Berryville and Calhoun, there is an area rich in the fossil petrifactions called “coal balls” in which cellular structures of stems and roots generally are well preserved.