The Geology of the Pothole

The Geology of the Pothole (HM26KF)

Location: Archbald, PA 18403 Lackawanna County
Country: United States of America

N 41° 30.712', W 75° 34.441'

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Inscription
"It is a fine case of a well-known phenomenon called a glacial pothole."
Geologist J.C. Branner, 1884
Formation
About 20,000 years ago, a powerful, whirling mixture of frigid glacial water, sand and stones wore away solid rock, forming this pothole.
Many Theories
At the pothole's discovery, geologists proposed that it was carved by a waterfall falling through a crevasse (crack) in the glacier. Many modern geologists still support this original theory.
A recent addition to this hypothesis places a lake on top of the glacier as a long-term water supply for the waterfall.
Other geologists propose that there was no waterfall. They argue that a large, fast-moving stream under the glacier supplied the swirling water that created the pothole.
Melted ice carrying abrasive sand and stones created this glacial pothole.
Comparisons confirm that this is a world-class glacial pothole. From bottom to top it measures 38 feet. At one place it is 42 by 24 feet in diameter.
Details
HM NumberHM26KF
Tags
Placed ByPennsylvania Department of Conservation & Natural Resources
Marker ConditionNo reports yet
Date Added Tuesday, April 3rd, 2018 at 7:02pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)18T E 452099 N 4595740
Decimal Degrees41.51186667, -75.57401667
Degrees and Decimal MinutesN 41° 30.712', W 75° 34.441'
Degrees, Minutes and Seconds41° 30' 42.72" N, 75° 34' 26.46" W
Driving DirectionsGoogle Maps
Area Code(s)570
Closest Postal AddressAt or near 801-859 US-6 BUS, Archbald PA 18403, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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