pothole

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pothole,

in geology, cylindrical pit formed in the rocky channel of a turbulent stream. It is formed and enlarged by the abrading action of pebbles and cobbles that are carried by eddies, or circular water currents that move against the main current of a stream. Potholes are most commonly found at the bottoms of eddies in rivers and in plunge pools below cataracts; sometimes potholes in a rock outcrop indicate the former site of a rapid or cataract. Potholes are often found in formerly glaciated regions where whirling columns of glacial meltwater sank well-like holes, or moulins, through the ice. Notable potholes are found in Ausable Chasm, N.Y., and Shelburne Falls, Mass. Potholes also refer to holes formed in human-made materials found in roads that are effected by natural freeze-thaw cycles or moisture (see weatheringweathering,
collective term for the processes by which rock at or near the earth's surface is disintegrated and decomposed by the action of atmospheric agents, water, and living things. Some of these processes are mechanical, e.g.
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).
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pothole

[′pät‚hōl]
(civil engineering)
A pot-shaped hole in a pavement surface.
(geology)
A shaftlike cave opening upward to the surface.
Any bowl-shaped, cylindrical, or circular hole formed by the grinding action of a stone in the rocky bed of a river or stream. Also known as churn hole; colk; eddy mill; evorsion hollow; kettle; pot.
A vertical, or nearly vertical shaft in limestone. Also known as aven; cenote.
A small depression with steep sides in a coastal marsh; contains water at or below low-tide level. Also known as rotten spot.
(hydrology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

pothole

1. Geography
a. a deep hole in limestone areas resulting from action by running water
b. a circular hole in the bed of a river produced by abrasion
2. a deep hole, esp one produced in a road surface by wear or weathering
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
After falling foul of wall-crawling subterranean cannibals last time around, the now-catatonic potholer Sarah (Shauna Macdonald) returns to the blood-soaked caverns accompanied with a rescue team.
potholer rescued: Rescue teams worked through the night to reach a potholer seriously injured by a falling boulder in a cave.
AN INJURED potholer was waiting to be rescued today after becoming trapped underground while exploring a network of caves in Wales.
AN injured potholer trapped underground for almost 24 hours was rescued yesterday in a ``superhuman'' operation involving 100 volunteers.
A British potholer told yesterday how he lay bleeding in an underground cave for six hours after being impaled on a stalagmite.
The terrified potholer in her 20s was cut off from her three friends in Co Clare on Saturday.
Rescuers searching for a potholer missing for a week in one of the UK's most dangerous caves last night found a body.
"The individual who is an adventurer, a sailor, a mountaineer or a potholer still has an awful lot to go for but they are not the kind of things that grab the media headlines."
Set in a dying rural village, the movie revolves around a potholer who, after investigating a newly-discovered cavern in the countryside, is horrified to find out that his girlfriend has been attacked nearby.
A FEARLESS potholer clings precariously to a rope at the foot of the UK's biggest cave as his mate watches anxiously from the ceiling above.
But, after 20 years on the show, the event that is etched into actor Derek Thompson's mind more than any other is being lowered into a cave to rescue a potholer. And he admits this had more to do with fancying his co-star than his on-screen heroics.
Potholers explore Gaping Gill, the unbroken waterfall - estimated to largest cavern in Britain, situated in Yorkshire Dales National Park, ahead of its opening to the public next weekend.