Pennsylvania Geological Survey - Historical Photographs - Browse all items

Pennsylvania Geological Survey - Historical Photographs - Browse all items - Pennsylvania Photos and Documents

Along Interstate 80 on the Appalachian Plateau

Cockeysville marble quarry

Hershey Home for Boys along Route 322

Homes destroyed by mine subsidence

Homes destroyed by mine subsidence

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Indian Echo Cave south of Hummelstown

Interstate 81 bridge construction over the Swatara River, Swatara Gap

Interstate 81, syncline exposed between Ravine and Tremont

Interstate 81, view north from I-81 near Hazelton

Interstate 81, view of Swatara Gap at Lickdale

Joint-block separation in sandstone of the Pocono Formation

Landfill closed approximately five years ago near Williamson's Park

Landfill closed approximately five years ago near Williamson's Park

Landfill closed approximately five years ago near Williamson's Park

Landfill closed approximately five years ago near Williamson's Park

Landfill closed approximately five years ago near Williamson's Park

McKenzie Formation

McKenzie Formation

Montour Steam Generating Plant

Possible sinkholes developed in parking lot

Quarry filled in

Quarry filled to contour

Quarry filled to contour

Quarry filled to contour

Quarry filled to contour

Quarry filled to contour

Quarry filled to contour

Ricketts Glen State Park

Ricketts Glen State Park

Ricketts Glen State Park

Ricketts Glen State Park

Ricketts Glen State Park

Ricketts Glen State Park

Sinkhole at northeast corner of intersection of 422 and Quarry Road

Sinkhole at northeast corner of intersection of Route 422 and Quarry Road

Sinkhole at northeast corner of intersection of Route 422 and Quarry Road

Sinkhole at northeast corner of intersection of Route 422 and Quarry Road

Sinkhole at northeast corner of intersection of Route 422 and Quarry Road

Sinkhole at northeast corner of intersection of Route 422 and Quarry Road

Sinkhole at northeast corner of intersection of Route 422 and Quarry Road

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Pennsylvania Geological Survey - Historical Photographs