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Stone description: light gray
| Wall Number | Country | State | Classification Sort ascending | Source |
|---|---|---|---|---|
| 8LA36 | United States | Missouri | Sandstone | Clinton |
| 8RB19 | United States | Pennsylvania | Sandstone | Corry |
| 9RA39 | United States | Wyoming | Sandstone | Rawlins |
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 8La46 | United States | Washington | Sandstone | Wilkeson |
| 9RA42 | United States | Illinois | Sandstone | Xenia |
| 5LA18 | United States | Ohio | Sandstone | Plymouth |
| 6LA3 | United States | Pennsylvania | Sandstone | Wampum |
| 7RA31 | United States | Colorado | Sandstone | Coal Creek |
| 8Lb46 | United States | Washington | Sandstone | Pittsburgh |
| 5LA9 | United States | Ohio | Sandstone | Piketon |
| 6LA33 | United States | Colorado | Sandstone | Trinidad |
| 6RB28 | United States | New York | Sandstone | Canisteo |
| 7RA44 | United States | New Mexico | Sandstone | Las Vegas |
| 10Lb46 | United States | Wisconsin | Sandstone | Mauston |
| 8r48 | United States | Ohio | Sandstone | Berea |
| 9RB21 | United States | Ohio | Sandstone | Berea |
| 6LB13 | United States | Pennsylvania | Sandstone | Beaver Falls |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 9LA18 | United States | Pennsylvania | Sandstone | Antrim |
| 6LB20 | United States | Ohio | Sandstone | Sunbury |
| 9RB39 | United States | Indiana | Sandstone | Paoli |
| 6LB42 | United States | New Jersey | Sandstone | Stockton |
| 9LA39 | United States | Indiana | Sandstone | French Lick Twp. |
| 9RB40 | United States | Indiana | Sandstone | Attica |
| 9LA41 | United States | Illinois | Sandstone | Chester |
| 5RA15 | United States | Ohio | Sandstone | Cambridge |
| 6RA10 | United States | Pennsylvania | Sandstone | Johnstown |
| 6RB7 | United States | Pennsylvania | Sandstone | Cannonsburgh |
| 8L48 | United States | Ohio | Sandstone | Berea |
| 6RA11 | United States | Pennsylvania | Sandstone | Layton Station Fayette Co. |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 5RB2 | United States | Ohio | Sandstone | Canal Dover Tuscarawas Co. |
| 10RB14 | United States | Indiana | Limestone | Stinesville |
| 12LA31 | United States | Illinois | Limestone | Joliet |
| 12RA4 | United States | Illinois | Limestone | Quincy |
| 14RB45 | United States | Kentucky | Limestone | Frankfort |
| 8LA15 | United States | Indiana | Limestone | Greenscastle |
| 8RA17 | United States | Kentucky | Limestone | Franklin |
| 9LB13 | United States | Iowa | Limestone | Burlington |
| 12LA32 | United States | Illinois | Limestone | Jonesborough |
| 13RB38 | United States | Illinois | Limestone | Sagetown |
| 14LB43 | United States | Nebraska | Limestone | LaPlatte |
| 8La17 | United States | Kentucky | Limestone | Russelville |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 12RB36 | United States | Indiana | Limestone | Bedford |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 13RB39 | United States | Illinois | Limestone | Columbia |
| 14Lb46 | United States | Kentucky | Limestone | Princeton |
| 4LB12 | United States | Indiana | Limestone | Salem |
| 10La21 | United States | Missouri | Limestone | Springfield |
| 12La36 | United States | Kentucky | Limestone | Bloomfield |
| 12RB40 | United States | Alabama | Limestone | Turks Cave |
| 13RA24 | United States | Kansas | Limestone | Douglass |
| 8RB15 | United States | Utah | Limestone | Ephriam |
| 10RB7 | United States | Missouri | Limestone | Hannibal |
| 11RA21 | United States | Missouri | Limestone | St. Louis |
| 12LA37 | United States | Alabama | Limestone | Trinity |
| 13LA11 | United States | Ohio | Limestone | Piqua River |
| 13RB43 | United States | Kentucky | Limestone | Litchfield |
| 4RB12 | United States | Indiana | Limestone | Salem |
| 11RA23 | United States | Nebraska | Limestone | Roca |
| 12LB35 | United States | Indiana | Limestone | Bedford |
| 13RA41 | United States | Kentucky | Limestone | Princeton |
| 13RB44 | United States | Kentucky | Limestone | Frankfort |
| 8RB7 | United States | Nebraska | Limestone | Roca |
| 11RA27 | United States | Kansas | Limestone | Cottonwood |
| 12RA1 | United States | Indiana | Limestone | Bedford |
| 13LA16 | United States | Iowa | Limestone | Fort Dodge |
| 13RA43 | United States | Kentucky | Limestone | Hopkinsville |
| 13rb46 | United States | Alabama | Limestone | Leighton |
| 2c | United States | Alabama | Limestone | Rockwood |
| 8rb9 | United States | Ohio | Limestone | Xenia |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 11RA29 | United States | Tennessee | Limestone | Sherwood Station |
| 12RA11 | United States | Kentucky | Limestone | Lagrange |
| 13RA44 | United States | Kentucky | Limestone | Pilot Knob |
| 14RA28 | United States | Tennessee | Limestone | Carter's Station Creek |
| 8LB6 | United States | Nebraska | Limestone | Roca |
| 9La10 | United States | Iowa | Limestone | Keosauque Station |
| 9RB13 | United States | Iowa | Limestone | Conrad |
| 13RA46 | United States | Kentucky | Limestone | Trenton |
| 14RB12 | United States | Indiana | Limestone | Oakdale |
| 7ra8 | United States | Alabama | Limestone | Dickson |
| 9LA13 | United States | Kansas | Limestone | Manhattan |
| 10RA23 | United States | Kansas | Limestone | Eldorado |
| 13LA37 | United States | New York | Limestone | Cottonwood Sta. |
| 13RA47 | United States | Alabama | Limestone | Rockwood |
| 7RA9 | United States | Alabama | Limestone | Tuscumbia |
| 11LA23 | United States | Kansas | Limestone | Eldorado |
| 13LA40 | United States | Ohio | Limestone | Newtonville |
| 14LA45 | Portugal | Limestone | Ega, Coimbra | |
| 8RA10 | United States | Illinois | Limestone | Chester |
| 12RA30 | United States | Illinois | Limestone | Joliet |
| 13La45 | United States | Kentucky | Limestone | Frankfort |
| 14LA46 | Portugal | Limestone | Janianes, Coimbra | |
| 8RA11 | United States | Illinois | Limestone | Rockport |
| 12RA32 | United States | Indiana | Limestone | Salem |
| 14RB21 | United States | Iowa | Limestone | Pella Station, Marion Co. |
| 8RA12 | United States | Illinois | Limestone | Jonesborough |