Archbald Pothole State Park is a small park located in Lackawanna County just north of a busy shopping strip on Business Route 6. The pothole is the remains of the Wisconsin Glacial Period. It is 38 feet (11.6 m) deep with a largest diameter of 42 feet (12.8 m) by 24 feet (7.3 m). It has been a tourist attraction since it was discovered in 1884.
Archbald Pothole cuts through layers of sandstone, shale and coal. A pothole, in geologic terms, is a hole that is worn into the bedrock of a stream in strong rapids or at the base of a waterfall. The force of the water spins rock fragments, sand and gravel into a small indentation in the bedrock. After years and years of constant spinning, the stones and sands carve out an elliptical hole. Potholes are also formed by the action of glacial meltwater. Archbald Pothole was formed during the Wisconsin Glacial Period. As the glacier melted, a stream that flowed on top may have fallen into a crevasse and then fell to the bedrock. The force of the falling water created a pothole in much the same way that a waterfall creates a pothole. The pothole was filled by falling sand, rocks and gravel as the glacier retreated and created other potholes. Archbald Pothole was preserved underground for nearly 13,000 years until its discovery by Patrick Mahon in 1884 while extending a mine shaft.
The park also has opportunities for hiking and hunting as well as some picnic tables.
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