Country State Classification Source WallNo Centennial Commercial Location surroundPic
United States Pennsylvania Quartzite Mapleton 7La18 26171 y Front Face (South) Dscf0134.jpg
No 7LA18 is:

Description

light gray
fine grain
compact
Upper Silurian


Picture of the Archive Stone:
/archive/front/7la18.jpg
Actual Picture from the Stone Wall: /mid2000/7la18.jpg (63575 bytes)