Pennsylvania Geological Survey - Historical Photographs - Browse all items

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

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

Sinkhole, Derry Township

Sinkhole, Derry Township

Sinkhole, Derry Township

Sinkhole, Derry Township

Sinkhole, Derry Township

Sinkhole, Palmyra Borough

Sinkhole, Palmyra Borough

Sinkhole, Palmyra Borough

Slope failure, Triassic sandstone and conglomerate

Slope failure, Triassic sandstone and conglomerate

Slope failure, Triassic sandstone and conglomerate

Slope failure, Triassic sandstone and conglomerate

Slope failure,Triassic sandstone and conglomerate

Tree wedging; diabase break-up

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Triassic border fault (?)

Unconformity, Martinsburg Formation and Tuscarora quartzite

Unconformity, Martinsburg Formation and Tuscarora quartzite

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Pennsylvania Geological Survey - Historical Photographs