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Stone description: slate

Wall Number Sort descending Country State Classification Source
10L51 United States Pennsylvania Argillite (Slate) Lynnport
10LB18 United States Pennsylvania Argillite (Slate) Lynnport
10R51 United States Pennsylvania Argillite (Slate) Lynnport
10RB30 United States New York Argillite (Slate) Middle Granville
9RA17 United States Pennsylvania Argillite (Slate) Lynnport
9RA30 United States New York Argillite (Slate) Hampton