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Stone description: Lower carboniferous
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 7RA14 | United States | Pennsylvania | Limestone | Connellsville |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 7RA28 | United States | Kentucky | Sandstone | Cloveport |
| 7RB19 | United States | Ohio | Sandstone | Amherst |
| 7RB20 | United States | Ohio | Sandstone | Independence |
| 7RB27 | United States | Kentucky | Sandstone | Marion |
| 8LA13 | United States | Indiana | Limestone | Fort Ritner |
| 8LA15 | United States | Indiana | Limestone | Greenscastle |
| 8LA20 | United States | Ohio | Sandstone | Portsmouth |
| 8LA31 | United States | Kentucky | Sandstone | Johnson Co. |
| 8LB20 | United States | Ohio | Sandstone | Berea |
| 8LB31 | United States | Kentucky | Sandstone | Cloveport |
| 8RA10 | United States | Illinois | Limestone | Chester |
| 8RA13 | United States | Indiana | Limestone | Bedford |
| 8RA15 | United States | Indiana | Limestone | Putnamville |
| 8RA16 | United States | Indiana | Limestone | Ellettsville |
| 8RA20 | United States | Ohio | Sandstone | Elyria |
| 8RA21 | United States | Ohio | Sandstone | Brooklyn |
| 8RB20 | United States | Ohio | Sandstone | Middleburg Twp. Cuyahoga Co. |
| 8RB21 | United States | Ohio | Sandstone | Amherst |
| 9La10 | United States | Iowa | Limestone | Keosauque Station |
| 9LA21 | United States | Ohio | Sandstone | Lancaster |
| 9LA22 | United States | Ohio | Sandstone | Logan |
| 9LA39 | United States | Indiana | Sandstone | French Lick Twp. |
| 9LA40 | United States | Illinois | Sandstone | Pinckneyville |
| 9LA41 | United States | Illinois | Sandstone | Chester |
| 9LA42 | United States | Illinois | Sandstone | Chester |
| 9LB11 | United States | Iowa | Limestone | Durham Sta. Marion Co. |
| 9LB14 | United States | Iowa | Limestone | Fairfield |
| 9LB21 | United States | Ohio | Sandstone | Twinsburg |
| 9LB22 | United States | Ohio | Sandstone | Mansfield |
| 9LB40 | United States | Indiana | Sandstone | French Lick Twp. |
| 9RA10 | United States | Iowa | Limestone | Ottumwa |
| 9RA11 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 9RA21 | United States | Ohio | Sandstone | Monclava |
| 9RA22 | United States | Ohio | Sandstone | Newark |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 9RB11 | United States | Iowa | Limestone | Givin |
| 9RB13 | United States | Iowa | Limestone | Conrad |
| 9RB20 | United States | Ohio | Sandstone | Harmer |
| 9RB39 | United States | Indiana | Sandstone | Paoli |