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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Archbald in Lackawanna County, Pennsylvania — The American Northeast (Mid-Atlantic)
 

The Geology of the Pothole

 
 
The Geology of the Pothole Marker image. Click for full size.
By William Fischer, Jr., April 2, 2018
1. The Geology of the Pothole Marker
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.
 
Erected by Pennsylvania Department of Conservation & Natural Resources.
 
Location. 41° 30.712′ N, 75° 34.441′ W. Marker is in Archbald, Pennsylvania, in Lackawanna County. Touch for map

The Geology of the Pothole Marker image. Click for full size.
By William Fischer, Jr., April 2, 2018
2. The Geology of the Pothole Marker
On other side of kiosk, next to the observation platform
. Marker kiosk is near the pothole in Archbald Pothole State Park. Marker is at or near this postal address: 861 Scranton Carbondale Highway, Archbald PA 18403, United States of America.
 
Other nearby markers. At least 8 other markers are within 4 miles of this marker, measured as the crow flies. Discovery of the Pothole (here, next to this marker); Lackawanna Heritage Valley (here, next to this marker); First Aid Pioneer (approx. 1.9 miles away); Veterans Memorial Bridge (approx. 2 miles away); Lackawanna River Foot-Bridge (approx. 2 miles away); War Memorial (approx. 2.1 miles away); Loretto Perfectus Walsh (approx. 3.3 miles away); John J. Morelli (approx. 3.4 miles away). Touch for a list and map of all markers in Archbald.
 
Also see . . .  History of Archbald State Park. (Submitted on April 3, 2018, by William Fischer, Jr. of Scranton, Pennsylvania.)
 
Categories. Natural Features
 
Pothole and Observation Platform image. Click for full size.
By William Fischer, Jr.
3. Pothole and Observation Platform
Archbald Pothole image. Click for full size.
By William Fischer, Jr.
4. Archbald Pothole
Archbald Pothole State Park Sign image. Click for full size.
By William Fischer, Jr.
5. Archbald Pothole State Park Sign
 
 
Credits. This page was last revised on April 3, 2018. This page originally submitted on April 3, 2018, by William Fischer, Jr. of Scranton, Pennsylvania. This page has been viewed 38 times since then. Photos:   1, 2, 3, 4, 5. submitted on April 3, 2018, by William Fischer, Jr. of Scranton, Pennsylvania.
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