Country State Classification Source WallNo Centennial Commercial Location surroundPic
United States Pennsylvania Sandstone Danville 6RA18 25962 n Front Face (South) Dscf0109.jpg
No 6RA18 is:

Description

dark blue gray
fine grain
compact
Upper Silurian


Picture of the Archive Stone:
/archive/front/6ra18.jpg
Actual Picture from the Stone Wall: /mid2000/6ra18.jpg (63575 bytes)