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Stone description: Lower Silurian
| Wall Number | Country | State | Classification | Source Sort ascending |
|---|---|---|---|---|
| 13LB3 | United States | Tennessee | Marble | Calhoun |
| 14LB5 | United States | Tennessee | Marble | Calhoun |
| 13RA3 | United States | Tennessee | Marble | Calhoun |
| 12lb39 | United States | Alabama | Limestone | Calera |
| 7RA30 | United States | Texas | Sandstone | Burnet |
| 14RA5 | United States | Wisconsin | Dolomite | Buffalo Co. |
| 11RB4 | United States | Wisconsin | Dolomite | Buffalo Co. |
| 14Lb40 | United States | Pennsylvania | Marble | Bridgeport |
| 11RA12 | United States | Missouri | Dolomite | Bowling Green |
| 14RB47 | United States | Kentucky | Limestone | Bloomfield |
| 8RB32 | United States | Texas | Sandstone | Back Bone Valley |
| 14RB6 | United States | New York | Limestone | Amsterdam |
| 9RB15 | United States | Massachusetts | Marble | Alford |
| 13LB33 | United States | Massachusetts | Marble | Alford |
| 10RB48 | United States | Wisconsin | Sandstone | Ableman |
| 9RB41 | United States | Wisconsin | Sandstone | Ableman |