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Stone description: Upper Silurian
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| 9RB14 | United States | Iowa | Limestone | Tipton |
| 11RB5 | United States | New York | Limestone | Howe's Cave |
| 13la10 | United States | Ohio | Limestone | Covington |
| 12LA21 | United States | Iowa | Limestone | Tipton |
| 14RB40 | United States | Ohio | Limestone | Piqua |
| 14RB7 | United States | New York | Limestone | Howe's Cave |
| 12LB6 | United States | New York | Limestone | Schoharie |
| 12RA11 | United States | Kentucky | Limestone | Lagrange |
| 12RA14 | United States | Ohio | Limestone | Dayton |
| 11LA33 | United States | Ohio | Limestone | Lumberton |
| 12RA7 | United States | New York | Limestone | Crown Point |
| 13RA5 | United States | New York | Limestone | Howe's Cave |
| 8rb9 | United States | Ohio | Limestone | Xenia |
| 10RB29 | United States | New York | Sandstone | Medina |
| 6RA18 | United States | Pennsylvania | Sandstone | Danville |
| 6RA29 | United States | New York | Sandstone | Albion |
| 7RA26 | United States | New York | Sandstone | Camden |
| 7RA27 | United States | New York | Sandstone | Albion |
| 8LB28 | United States | New York | Sandstone | Hulberton |
| 8RB29 | United States | New York | Sandstone | Albion |
| 10LB11 | United States | Virginia | Marble | Craigsville |
| 10RB18 | United States | Virginia | Marble | Craigsville |
| 13LB5 | United States | New York | Marble | Lockport |
| 11LA30 | United States | New York | Marble | Greensport |
| 11RA3 | United States | Illinois | Dolomite | Lemont |
| 12RB1 | United States | Indiana | Dolomite | Decatur |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |
| 14ra13 | United States | Ohio | Dolomite | Columbus Grove |
| 11RB1 | United States | Illinois | Dolomite | Joilet |
| 12RB15 | United States | Iowa | Dolomite | Sabula |
| 13RB11 | United States | Ohio | Dolomite | Yellow Springs |
| 14RA2 | United States | Illinois | Dolomite | Joilet |
| 12RB6 | United States | Wisconsin | Dolomite | Manitowoc |
| 13RB12 | United States | Ohio | Dolomite | Greenfield |
| 14RA4 | United States | Illinois | Dolomite | Sag's Bridge |
| 10LA11 | United States | Ohio | Dolomite | Lima |
| 12LA1 | United States | Indiana | Dolomite | Greensburgh |
| 13RB2 | United States | Illinois | Dolomite | Joilet |
| 14rb11 | United States | Ohio | Dolomite | Bluffton |
| 12LA10 | United States | Ohio | Dolomite | Euphemia |
| 13LA12 | United States | Ohio | Dolomite | Freemont |
| 13RB4 | United States | Wisconsin | Dolomite | Byron |
| 14RB4 | United States | Illinois | Dolomite | Kankakee |
| 10RA14 | United States | Ohio | Dolomite | Van Wert |
| 13LA15 | United States | Iowa | Dolomite | St. Claire |
| 14LA12 | United States | Ohio | Dolomite | Yellow Springs |
| 10RA9 | United States | Wisconsin | Dolomite | Byron |
| 12LA3 | United States | Illinois | Dolomite | Joilet |
| 13LA2 | United States | Illinois | Dolomite | Lemont |
| 14LA13 | United States | Ohio | Dolomite | Urbana |
| 14RB5 | United States | Wisconsin | Dolomite | Eden |
| 12LB10 | United States | Ohio | Dolomite | New Paris |
| 13LB10 | United States | Ohio | Dolomite | Springfield |
| 14LA2 | United States | Illinois | Dolomite | Aurora |
| 12LB3 | United States | Illinois | Dolomite | Lemont |
| 13LB11 | United States | Ohio | Dolomite | Covington |
| 14LA3 | United States | Illinois | Dolomite | Joilet |
| 11LA11 | United States | Kentucky | Dolomite | Bardstown |
| 13LB2 | United States | Illinois | Dolomite | Lemont |
| 14LA6 | United States | Wisconsin | Dolomite | Taycheedah Twp. Fon du Lac Co. |
| 11LA15 | United States | Iowa | Dolomite | Clinton |
| 13LB4 | United States | Wisconsin | Dolomite | Racine |
| 14LB11 | United States | Ohio | Dolomite | Greenfield |
| 11LA3 | United States | Wisconsin | Dolomite | Waukesha |
| 12RA12 | United States | Ohio | Dolomite | Lexington |
| 14LB12 | United States | Ohio | Dolomite | Tiffin |
| 13LB6 | United States | New York | Dolomite | Lockport |
| 14LB16 | United States | Iowa | Dolomite | Clemont |
| 12RA3 | United States | Illinois | Dolomite | Chicago |
| 13RA11 | United States | Ohio | Dolomite | Springfield |
| 14LB17 | United States | Iowa | Dolomite | Monticello |
| 11LB11 | United States | Ohio | Dolomite | Riley Twp. Putnam Co. |
| 12RA6 | United States | Wisconsin | Dolomite | Milwaukee |
| 13RA2 | United States | Illinois | Dolomite | Lemont |
| 14LB4 | United States | Illinois | Dolomite | Chicago |
| 11LB12 | United States | Ohio | Dolomite | Eaton |
| 14RA12 | United States | Ohio | Dolomite | Tiffin |
| 7La18 | United States | Pennsylvania | Quartzite | Mapleton |