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Stone description: ferruginous
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 11LA15 | United States | Iowa | Dolomite | Clinton |
| 11LA36 | Portugal | Sandstone | St. Miguel, Coimbra | |
| 11RA38 | United States | Tennessee | Sandstone | Ducktown |
| 12RB15 | United States | Iowa | Dolomite | Sabula |
| 14RB18 | United States | Iowa | Dolomite | Dixon |
| 8RB32 | United States | Texas | Sandstone | Back Bone Valley |
| 9LA36 | United States | New Jersey | Conglomerate | May's Landing Atlantic Co. |
| 9RB11 | United States | Iowa | Limestone | Givin |
| 9RB34 | United States | Alabama | Sandstone | DaKalb County |