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![Southwest-northeast cross section in the Illinois Basin, southeastern flank of Ozark Dome, Missouri, to southern Illinois [Scott County, Missouri to Wayne County, Illinois]](https://data.igws.indiana.edu/filestore/0/2/2/0/4_276ce30bcc2eba0/40220thm_3753a6963900c83.jpg?v=2022-06-30+13%3A14%3A25)
![West-east cross section in the Illinois Basin, Ozark Dome, Missouri, to Rough Creek Graben, western Kentucky [Madison County, Missouri to Webster County, Kentucky]](https://data.igws.indiana.edu/filestore/9/1/2/0/4_871f9eb543082b2/40219thm_5fe46c128db2cbf.jpg?v=2022-06-30+13%3A14%3A28)
![Northwest-southeast cross section in the Illinois Basin, Sparta Shelf, southern Illinois, to Rough Creek Graben, western Kentucky [Washington County, Illinois to Caldwell County, Kentucky]](https://data.igws.indiana.edu/filestore/8/1/2/0/4_bb12f021f13fee5/40218thm_3a25bda7f68c9c2.jpg?v=2022-06-30+13%3A14%3A22)
