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Stone description: Lower carboniferous
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| 12LB21 | United States | Missouri | Limestone | St. Louis |
| 13LB20 | United States | Iowa | Limestone | Mt. Pleasant |
| 14Lb46 | United States | Kentucky | Limestone | Princeton |
| 12LB36 | United States | Indiana | Limestone | Salem |
| 13LB45 | United States | Kentucky | Limestone | Green Co. |
| 9LB11 | United States | Iowa | Limestone | Durham Sta. Marion Co. |
| 10LA20 | United States | Iowa | Limestone | Iowa Falls |
| 12RA1 | United States | Indiana | Limestone | Bedford |
| 8RA10 | United States | Illinois | Limestone | Chester |
| 9LB14 | United States | Iowa | Limestone | Fairfield |
| 10La21 | United States | Missouri | Limestone | Springfield |
| 12RA32 | United States | Indiana | Limestone | Salem |
| 14RA21 | United States | Iowa | Limestone | Washington |
| 8RA13 | United States | Indiana | Limestone | Bedford |
| 12RA33 | United States | Indiana | Limestone | Spencer |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 14RA22 | United States | Iowa | Limestone | Winterset |
| 8RA15 | United States | Indiana | Limestone | Putnamville |
| 12RA34 | United States | Indiana | Limestone | Oakalla |
| 13RA41 | United States | Kentucky | Limestone | Princeton |
| 8RA16 | United States | Indiana | Limestone | Ellettsville |
| 12RA36 | United States | Kentucky | Limestone | Garrett |
| 13RA42 | United States | Kentucky | Limestone | Princeton |
| 14RB14 | United States | Iowa | Limestone | Le-Grand |
| 7RA14 | United States | Pennsylvania | Limestone | Connellsville |
| 9RA10 | United States | Iowa | Limestone | Ottumwa |
| 13RB39 | United States | Illinois | Limestone | Columbia |
| 9RA11 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 11LB20 | United States | Iowa | Limestone | Iowa Falls |
| 13RB40 | United States | Illinois | Limestone | Chester |
| 12RB21 | United States | Missouri | Limestone | Glencoe |
| 13RB42 | United States | Indiana | Limestone | Bedford |
| 14RB20 | United States | Iowa | Limestone | Winterset |
| 11RA19 | United States | Iowa | Limestone | Montour |
| 12RB4 | United States | Illinois | Limestone | Breese |
| 13RB45 | United States | Kentucky | Limestone | Dennis |
| 14RB21 | United States | Iowa | Limestone | Pella Station, Marion Co. |
| 9La10 | United States | Iowa | Limestone | Keosauque Station |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 11RA21 | United States | Missouri | Limestone | St. Louis |
| 14RB23 | United States | Iowa | Limestone | Montour |
| 9RB11 | United States | Iowa | Limestone | Givin |
| 13LA21 | United States | Iowa | Limestone | Quarry, Marshall Co. |
| 14LA20 | United States | Iowa | Limestone | Mt. Pleasant |
| 4LB12 | United States | Indiana | Limestone | Salem |
| 8LA13 | United States | Indiana | Limestone | Fort Ritner |
| 9RB13 | United States | Iowa | Limestone | Conrad |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 13LA40 | United States | Ohio | Limestone | Newtonville |
| 14LB20 | United States | Iowa | Limestone | Knoxville |
| 4RB12 | United States | Indiana | Limestone | Salem |
| 8LA15 | United States | Indiana | Limestone | Greenscastle |
| 13LA42 | United States | Illinois | Limestone | Quincy |
| 14LB21 | United States | Iowa | Limestone | Dudley Sta. Wapello Co. |
| 13LA43 | United States | Kentucky | Limestone | Grahampton |
| 14LB22 | United States | Iowa | Limestone | Dudley Sta. Wapello Co. |
| 5LA16 | United States | Ohio | Sandstone | Windsor |
| 5RA12 | United States | Ohio | Sandstone | Euclid |
| 6LB30 | United States | Kentucky | Sandstone | Cloveport |
| 8LB20 | United States | Ohio | Sandstone | Berea |
| 9LA42 | United States | Illinois | Sandstone | Chester |
| 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 |
| 5LA6 | United States | Ohio | Sandstone | Weller Twp. Richland Co. |
| 5RA8 | United States | Ohio | Sandstone | Greenfield |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 8RA21 | United States | Ohio | Sandstone | Brooklyn |
| 5LA9 | United States | Ohio | Sandstone | Piketon |
| 5RA9 | United States | Ohio | Sandstone | Belleville |
| 7RA28 | United States | Kentucky | Sandstone | Cloveport |
| 8RB20 | United States | Ohio | Sandstone | Middleburg Twp. Cuyahoga Co. |
| 9RA21 | United States | Ohio | Sandstone | Monclava |
| 5LB1 | United States | Ohio | Sandstone | N. Hampton |
| 5RB1 | United States | Ohio | Sandstone | Amherst |
| 7RB19 | United States | Ohio | Sandstone | Amherst |
| 8RB21 | United States | Ohio | Sandstone | Amherst |
| 9RA22 | United States | Ohio | Sandstone | Newark |