Country State Classification Source WallNo Centennial Commercial Location surroundPic
United States Pennsylvania Limestone Harrisburg 7RA13 37878 n Front Face (South) DSCF0237.jpg
No 7RA13 is:

Description

dark blue gray
white-veined
fine grain
compact
Lower Silurian


Picture of the Archive Stone:
/archive/front/7ra13.jpg
Actual Picture from the Stone Wall: /mid2000/7ra13.jpg (63575 bytes)