Pennsylvania Geological Survey - Historical Photographs

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About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.

Boudinage structures

Structure

Boudinage structures, Womelsdorf quadrangle. "Boudins" near Richland, Lebanon County

Cleavage and joint planes in red shale

Structure

Cleavage and joint planes in red shale (Martinsburg), north of Quittapahilla Creek

Normal fault cutting Montebello (?)

Structure

Normal fault cutting Montebello (?), north end of west side of Swatara Gap

Plunging anticline, south of Tower City

Structure

Plunging anticline, south of Tower City

Structure

Unconformity, Martinsburg Formation and Tuscarora quartzite along Interstate 81, north of Lickdale (Swatara Gap)

Structure

Unconformity, Martinsburg Formation and Tuscarora quartzite along Interstate 81, north of Lickdale (Swatara Gap)