Other collecting localities have been recorded west of McLeansboro in
Hamilton County, northwest of Mt. Vernon in Jefferson County, near
Grayville in White County, and in the Friendsville area of Wabash
County. There is no doubt that careful search will turn up many more.
Almost anywhere in the large coal producing areas of southern Illinois
plant fossils can be found either in spoil heaps or in outcrops along
stream, road, and railroad cuts. The thick Pennsylvanian sandstones that
crop out in a belt extending through Gallatin, Saline, Williamson, and
Jackson Counties generally contain compressions or replacements of
trunks or other woody plant parts.