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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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)

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
References in periodicals archive ?
Dave Nixon, a local potholer and leading underground explorer, discovered the cave after finding an account by an obscure 18th century academic in a university library.
Canyoning guides from other member states who have not also trained as mountain guides, potholers or mountaineering instructors cannot provide their services in France.
Anglers, potholers, canoeists, birdwatchers and others who take part in country sports and recreations could find their access to the countryside curbed because of legislation being debated in the House of Lords this week, campaigners claim today.
This property is a family home ideal for bird lovers or potholers!
"We launched a poster campaign in East Lothian asking the public and people who have hobbies, such as abseilers and potholers, if they would help search for her.
The Mexican government took a dim view of the group of army 'potholers' travelling on tourist visas and expelled them from the country in far less time than it took Rick took to show them how to use oxygen masks and lead them to safety.
THE British potholers rescued from a waterlogged cavern in Mexico, after being trapped for more than a week, were plunged into more trouble today.
SYLVIA, HAYLEY AND ROY CORONATION STREET Enigmatic Roy Cropper is such a deep man that potholers have been known to go missing when they've tried to work him out.
"I have an elite squad of potholers out each night, how else d'you think they appear so suddenly?" Makes you think, eh?
CAVE divers helped rescue 25 potholers trapped underground in Yorkshire by rising waters.
For potholers, there are a number of charted caves in the area.
POTHOLERS swept to their deaths in a cave will be named by police today.