Country State Classification Source WallNo Centennial Commercial Location surroundPic
United States Pennsylvania Limestone East Conshohocken 7La13 37873 n Front Face (South) Dscf0132.jpg
No 7LA13 is:

Description
blue gray
medium grain
compact
micaceous
Lower Silurian


Picture of the Archive Stone:
/archive/front/7la13.jpg		 Actual Picture from the Stone Wall: /mid2000/7la13.jpg (63575 bytes)