Grand Canyon of Pennsylvania - Formation

Formation

Pine Creek Gorge is a product of the last ice age. Pine Creek had flowed northeasterly until about 20,000 years ago, when the receding Laurentide Continental Glacier dammed it with rocks, soil, and other debris. Glacial meltwater formed a lake near the present town of Ansonia, and when it overflowed the debris dam, the creek flooded to the south. Ultimately, it carved a deep channel on its way south to the West Branch Susquehanna River.

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