Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Location Covered = Blair
  • Contributing Institution = Pennsylvania Geological Survey
  • Subject = Structure-Folds

About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.
Displaying 10 items
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Bent strata
Bent strata
Structure-Folds
Bent strata, railroad cut west of Birmingham Station.
Crushed, overturned anticline
Crushed, overturned anticline
Structure-Folds
Crushed, overturned anticline. Railroad cut west of Birmingham Station.
Dipping and slightly fractured Bellefonte strata
Dipping and slightly fractured Bellefonte strata
Structure-Folds
Dipping and slightly fractured Bellefonte strata. Railroad cut near Ironville.
Folded and faulted strata
Folded and faulted strata
Structure-Folds
Folded and faulted strata, railroad cut west of Birmingham Station.
Folded strata
Folded strata
Structure-Folds
Folded strata, Oswego sandstone. Between Tyrone and Nealmont.
Folded strata
Folded strata
Structure-Folds
Folded strata, Oswego sandstone. Between Tyrone and Nealmont.
Folded strata
Folded strata
Structure-Folds
Folded strata, railroad cut west of Birmingham Station.
Folded strata
Folded strata
Structure-Folds
Folded strata between Tyrone and Nealmont.
Nearly vertical bedding in Rodman limestone
Nearly vertical bedding in Rodman limestone
Structure-Folds
Nearly vertical bedding in Rodman limestone. Elk Run near Irwinville, Tyrone quadrangle.
Ravine showing sharp fold
Ravine showing sharp fold
Structure-Folds
Ravine showing sharp fold near Birmingham. Note upturned strata in mid distance.