| Country | State | Classification | Source | WallNo | Centennial | Commercial | Location | surroundPic |
| United States | Illinois | Dolomite | Chicago | 12RA3 | 29642/2 n | n | Front Face (South) | Dscf0444.jpg |
Description |
| light gray |
| fine grain |
| compact |
| Upper Silurian |
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No 12RA3 is:
| Picture of the Archive Stone: |
Actual Picture from the Stone Wall:
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