Country State Classification Source WallNo Centennial Commercial Location surroundPic
United States Pennsylvania Argillite (Slate) Slatington 10RB20   y Front Face (South) DSCF0341.jpg
No 10RB20 is:

Description

blue-black
fine grain
roofing and tile slate


ARCHIVE STONE NOT AVAILABLE

Actual Picture from the Stone Wall: /mid2000/10rb20.jpg (63575 bytes)