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Stone description: Lower carboniferous
| Wall Number | Country Sort descending | State | Classification | Source |
|---|---|---|---|---|
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 10LB20 | United States | Ohio | Sandstone | Lancaster |
| 5La2 | United States | Ohio | Sandstone | Norwalk |
| 9LB22 | United States | Ohio | Sandstone | Mansfield |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 10RB22 | United States | Ohio | Sandstone | Warren |
| 5LA3 | United States | Ohio | Sandstone | Peninsula |
| 9LB40 | United States | Indiana | Sandstone | French Lick Twp. |
| 13RA41 | United States | Kentucky | Limestone | Princeton |
| 7Lb19 | United States | Ohio | Sandstone | Portsmouth |
| 10RB36 | United States | Missouri | Sandstone | St. Genevieve |
| 5LA4 | United States | Ohio | Sandstone | Norwalk |
| 9RA10 | United States | Iowa | Limestone | Ottumwa |
| 13RA42 | United States | Kentucky | Limestone | Princeton |
| 7RA14 | United States | Pennsylvania | Limestone | Connellsville |
| 11LB15 | United States | Missouri | Dolomite | Sedalia |
| 5LA6 | United States | Ohio | Sandstone | Weller Twp. Richland Co. |
| 9RA11 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 13RB39 | United States | Illinois | Limestone | Columbia |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 11LB20 | United States | Iowa | Limestone | Iowa Falls |
| 5LA9 | United States | Ohio | Sandstone | Piketon |
| 9RA21 | United States | Ohio | Sandstone | Monclava |
| 13RB40 | United States | Illinois | Limestone | Chester |
| 7RA28 | United States | Kentucky | Sandstone | Cloveport |
| 11RA14 | United States | Iowa | Dolomite | Lansing |
| 5LB1 | United States | Ohio | Sandstone | N. Hampton |
| 9RA22 | United States | Ohio | Sandstone | Newark |
| 13RB42 | United States | Indiana | Limestone | Bedford |
| 7RB19 | United States | Ohio | Sandstone | Amherst |
| 11RA19 | United States | Iowa | Limestone | Montour |
| 5LB2 | United States | Ohio | Sandstone | Newburgh |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 13RB45 | United States | Kentucky | Limestone | Dennis |
| 7RB20 | United States | Ohio | Sandstone | Independence |
| 11RA21 | United States | Missouri | Limestone | St. Louis |
| 5LB5 | United States | Ohio | Sandstone | Newburgh |
| 9RB11 | United States | Iowa | Limestone | Givin |
| 14LA17 | United States | Iowa | Dolomite | Keokuk |
| 7RB27 | United States | Kentucky | Sandstone | Marion |