Columbia subject headings:
Carbonate reservoirs--Illinois.
Carbonate reservoirs--Kentucky.
Mud mounds--Illinois.
Mud mounds--Kentucky.
Ullin Limestone (Ill. and Ind.)
Harvard subject headings:
Carbonate reservoirs--Illinois.
Carbonate reservoirs--Kentucky.
Geology--Illinois
Geology--Kentucky
Petroleum--Geology--Illinois.
Ullin limestone and Fort Payne formation (Ill. and Ky.)
Warsaw formation (Ill. and Ky.)
Princeton subject headings: