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Stone description: Lower Silurian
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 9Lb29 | United States | New York | Sandstone | Schenectady |
| 9Lb3 | United States | Tennessee | Marble | Mooresburgh |
| 9LB42 | United States | Wisconsin | Sandstone | Grand Rapids |
| 9Lb7 | United States | Vermont | Marble | Southerland Falls |
| 9Lb8 | United States | Vermont | Marble | Southerland Falls |
| 9RA16 | United States | Minnesota | Limestone | St. Paul |
| 9RA2 | United States | Tennessee | Marble | Knoxville |
| 9RA33 | United States | Minnesota | Sandstone | Jordan |
| 9RA7 | United States | Vermont | Marble | W. Rutland |
| 9RA8 | United States | Vermont | Marble | Rutland |
| 9RB15 | United States | Massachusetts | Marble | Alford |
| 9RB2 | United States | Tennessee | Marble | Knoxville |
| 9RB27 | United States | New York | Sandstone | Potsdam |
| 9RB3 | United States | Tennessee | Marble | Knoxville |
| 9RB41 | United States | Wisconsin | Sandstone | Ableman |
| 9RB8 | United States | Vermont | Marble | Rutland |