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Stone description: light gray
| Wall Number | Country Sort descending | State | Classification | Source |
|---|---|---|---|---|
| 7RB45 | United States | New Mexico | Tuff | Santa Fe |
| 8L48 | United States | Ohio | Sandstone | Berea |
| 12LA11 | United States | Ohio | Dolomite | Pt. Marblehead |
| 14LA6 | United States | Wisconsin | Dolomite | Taycheedah Twp. Fon du Lac Co. |
| 6RA10 | United States | Pennsylvania | Sandstone | Johnstown |
| 9LA5 | United States | Missouri | Limestone | Barrett's Station |
| 10RA40 | United States | New Hampshire | Granite | Milford |
| 13LB14 | United States | Iowa | Dolomite | Delphi |
| 2R12 | United States | Vermont | Marble | Florence |
| 13LB2 | United States | Illinois | Dolomite | Lemont |
| 2R2 | United States | Vermont | Marble | Florence |
| 8LA12 | United States | Illinois | Limestone | Kinderhook |
| 12LA15 | United States | Iowa | Dolomite | Marshalltown |
| 14LB1 | United States | Indiana | Dolomite | Montpelier |
| 6RA11 | United States | Pennsylvania | Sandstone | Layton Station Fayette Co. |
| 9LA9 | United States | Iowa | Limestone | Burlington |
| 10RA9 | United States | Wisconsin | Dolomite | Byron |
| 10RB13 | United States | Iowa | Limestone | Blansett |
| 13LB44 | United States | Kentucky | Limestone | Lincoln Co. |
| 2R3 | United States | Vermont | Marble | Florence |
| 8LA13 | United States | Indiana | Limestone | Fort Ritner |
| 12LA3 | United States | Illinois | Dolomite | Joilet |
| 14LB13 | United States | Ohio | Limestone | Dayton |
| 6RA19 | United States | Pennsylvania | Quartzite | Jacksonwald |
| 9LB10 | United States | Iowa | Limestone | Bristow |
| 10RB14 | United States | Indiana | Limestone | Stinesville |
| 13LB6 | United States | New York | Dolomite | Lockport |
| 2R9 | United States | Vermont | Marble | Florence |
| 8LA15 | United States | Indiana | Limestone | Greenscastle |
| 12LA31 | United States | Illinois | Limestone | Joliet |
| 14LB15 | United States | Iowa | Dolomite | Manchester |
| 6RA20 | United States | Ohio | Sandstone | Lancaster |
| 9LB13 | United States | Iowa | Limestone | Burlington |
| 10RB25 | United States | Maine | Granite | Hallowell |
| 13RA2 | United States | Illinois | Dolomite | Lemont |
| 4L9 | United States | Ohio | Sandstone | Berea |
| 8La17 | United States | Kentucky | Limestone | Russelville |
| 12LA32 | United States | Illinois | Limestone | Jonesborough |
| 14LB43 | United States | Nebraska | Limestone | LaPlatte |
| 6RA4 | United States | Pennsylvania | Sandstone | Connellsville |
| 9LB23 | United States | Ohio | Sandstone | Marietta |
| 10RB32 | United States | Colorado | Sandstone | Fort Collins |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 4LB12 | United States | Indiana | Limestone | Salem |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 14Lb46 | United States | Kentucky | Limestone | Princeton |
| 6RA44 | United States | New Hampshire | Granite | Milford |
| 9LB24 | United States | Massachusetts | Gneiss | Charlton |
| 13RA25 | Cuba | Marble | Isle of Pines |