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Stone description: Lower carboniferous
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| 5La17 | United States | Ohio | Sandstone | Wooster |
| 5RA16 | United States | Ohio | Sandstone | Leesville |
| 6RA20 | United States | Ohio | Sandstone | Lancaster |
| 8LB31 | United States | Kentucky | Sandstone | Cloveport |
| 5LA18 | United States | Ohio | Sandstone | Plymouth |
| 5RA18 | United States | Ohio | Sandstone | E. Cleveland |
| 6RA21 | United States | Ohio | Sandstone | Ridgeville |
| 5LA19 | United States | Ohio | Sandstone | Mt. Gilead |
| 5RA19 | United States | Ohio | Sandstone | Mansfield |
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 9LB21 | United States | Ohio | Sandstone | Twinsburg |
| 10LB20 | United States | Ohio | Sandstone | Lancaster |
| 5La2 | United States | Ohio | Sandstone | Norwalk |
| 5RA2 | United States | Ohio | Sandstone | Iberia |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 9LB22 | United States | Ohio | Sandstone | Mansfield |
| 10RB22 | United States | Ohio | Sandstone | Warren |
| 5LA3 | United States | Ohio | Sandstone | Peninsula |
| 5RA4 | United States | Ohio | Sandstone | Buena Vista |
| 7Lb19 | United States | Ohio | Sandstone | Portsmouth |
| 9LB40 | United States | Indiana | Sandstone | French Lick Twp. |
| 10RB36 | United States | Missouri | Sandstone | St. Genevieve |
| 5LA4 | United States | Ohio | Sandstone | Norwalk |
| 5RA6 | United States | Ohio | Sandstone | Howard Station Knox Co. |
| 8RA20 | United States | Ohio | Sandstone | Elyria |
| 11LB15 | United States | Missouri | Dolomite | Sedalia |
| 12RB14 | United States | Missouri | Dolomite | St. Louis |
| 14RB16 | United States | Iowa | Dolomite | Franklin |
| 12RB16 | United States | Iowa | Dolomite | Humbolt |
| 14RB17 | United States | Iowa | Dolomite | Quarry, Marshall Co. |
| 11RA14 | United States | Iowa | Dolomite | Lansing |
| 13LA13 | United States | Iowa | Dolomite | Iowa Falls |
| 14LA17 | United States | Iowa | Dolomite | Keokuk |
| 12LA15 | United States | Iowa | Dolomite | Marshalltown |
| 12LB12 | United States | Kentucky | Dolomite | Louisville |
| 12LB17 | United States | Iowa | Dolomite | Dakota Sta. |
| 14RA14 | United States | Iowa | Dolomite | Ames Station Story Co. |
| 13RA13 | United States | Iowa | Dolomite | Humbolt |
| 14RA16 | United States | Iowa | Dolomite | Franklin |
| 13RA15 | United States | Iowa | Dolomite | Ames Station Story Co. |
| 14RA3 | United States | Illinois | Dolomite | Saline |