| Country | State | Classification | Source | WallNo | Centennial | Commercial | Location | surroundPic |
| United States | Iowa | Limestone | Mt. Pleasant | 13LB20 | 25340 | n | Front Face (South) | Dscf0702.jpg |
Description |
| drab |
| fine grain |
| compact |
| siliceous |
| Lower carboniferous |
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No 13LB20 is:
| Picture of the Archive Stone: |
Actual Picture from the Stone Wall:
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