| Country | State | Classification | Source | WallNo | Centennial | Commercial | Location | surroundPic |
| United States | Iowa | Limestone | Conrad | 9RB13 | 26391 | y | Front Face (South) | Dscf0274.jpg |
Description |
| light gray |
| medium grain |
| compact |
| oolitic |
| Lower carboniferous |
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No 9RB13 is:
| Picture of the Archive Stone: |
Actual Picture from the Stone Wall:
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