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Stone description: Niagara
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 11La1 | United States | Indiana | Dolomite | St. Paul |
| 11Lb23 | United States | Tennessee | Marble | Springville |
| 11RA1 | United States | Indiana | Dolomite | Wabash |
| 11RA15 | United States | Iowa | Dolomite | Olin |
| 12LA16 | United States | Iowa | Dolomite | Maquoketa |
| 12LB1 | United States | Indiana | Dolomite | Eaton |
| 12RA16 | United States | Iowa | Dolomite | Farley |
| 13LB14 | United States | Iowa | Dolomite | Delphi |
| 13RA14 | United States | Iowa | Dolomite | Dixon Sta. |
| 13RA16 | United States | Iowa | Dolomite | Stone City |
| 13RB16 | United States | Iowa | Dolomite | Farley |
| 13RB41 | United States | Indiana | Limestone | N. Vernon |
| 14LA1 | United States | Indiana | Dolomite | Logansport |
| 14LA14 | United States | Iowa | Dolomite | Mt. Vernon |
| 14LA16 | United States | Iowa | Dolomite | Stone City |
| 14LB1 | United States | Indiana | Dolomite | Montpelier |
| 14LB15 | United States | Iowa | Dolomite | Manchester |
| 14RA1 | United States | Indiana | Dolomite | Anderson |
| 14RA18 | United States | Iowa | Dolomite | Delphi |
| 14RB12 | United States | Indiana | Limestone | Oakdale |
| 14RB18 | United States | Iowa | Dolomite | Dixon |