Geologic units in Perry county, Illinois

Additional scientific data in this geographic area

Shelburn-Patoka Formations undivided (Pennsylvanian (Kasimovian)) at surface, covers 88 % of this area

Shelburn-Patoka Formations undivided.

Carbondale Formation (Pennsylvanian (Moscovian to Kasimovian)) at surface, covers 10 % of this area

Carbondale Formation.

Bond Formation (Pennsylvanian (Kasimovian)) at surface, covers 2 % of this area

Bond Formation

Tradewater Formation (Pennsylvanian (Bashkirian to Moscovian)) at surface, covers 0.4 % of this area

Tradewater Formation