Wissahickon Formation

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA

Photographed by Michael P. Klimetz

Quartz-Feldspar-Biotite-Almandine-Kyanite Gneiss

Wissahickon Valley

Philadelphia

Philadelphia County

PENNSYLVANIA