Pine Creek Gorge, sometimes called The Grand Canyon of Pennsylvania, is a 47-mile (76 km) gorge carved into the Allegheny Plateau by Pine Creek in north-central Pennsylvania.
Pine Creek Gorge in autumn.
Pine Creek Gorge in Brown Township in the Tiadaghton State Forest
Pine Creek lumber drive, with arks for kitchen and dining (left), sleeping (center), and horses (right): the railroad is on the shore behind.
A Shay locomotive from the Leetonia lumber railroad and the nearly clearcut Pine Creek Gorge, at one of the lookouts in what is now the park.
A canyon, gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency to cut through underlying surfaces, eventually wearing away rock layers as sediments are removed downstream. A river bed will gradually reach a baseline elevation, which is the same elevation as the body of water into which the river drains. The processes of weathering and erosion will form canyons when the river's headwaters and estuary are at significantly different elevations, particularly through regions where softer rock layers are intermingled with harder layers more resistant to weathering.
The Grand Canyon, Arizona, at the confluence of the Colorado River and Little Colorado River.
Sumidero Canyon, Mexico
Kevo Canyon in Utsjoki, Finland
Snake River Canyon, Idaho
