| Country | State | Classification | Source | WallNo | Centennial | Commercial | Location | surroundPic |
| United States | Iowa | Dolomite | Humbolt | 13RA13 | 26062 | y | Front Face (South) | Dscf0461.jpg |
Description |
| gray |
| compact |
| fine grain |
| Lower carboniferous |
| ||||||||||||||||||||
No 13RA13 is:
| Picture of the Archive Stone: |
Actual Picture from the Stone Wall:
| ||||||||||||||||||