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- A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface.
www.usgs.gov/faqs/what-a-sinkhole
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A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface. Sinkholes are most common in what geologists call, “karst terrain.”
- What is The Largest Sinkhole in The United States
A sinkhole is a depression in the ground that has no natural...
- What is The Largest Sinkhole in The United States
- Sinkhole Appearance
- What Triggers Sinkholes?
- Types of Sinkhole
- Where Does Karst Occur in The UK?
- Where Do Sinkholes Occur in The UK?
Some sinkholes result from the removal of a soluble rock such as chalk, gypsum or limestone. These are called solution sinkholes. These rocks dissolve when attacked by rainfall or groundwater that is acidic. Solution sinkholes have sides that vary from gentle slopes to almost vertical, while their shapes include saucer-like hollows, cones, cylindri...
Sinkholes can occur rapidly and apparently without warning. It is therefore important to consider the potential for sinkholes during planning (hazard susceptibility studies) and characterise them so that people can mitigate associated risks. Several processes can trigger sinkholes. Whilst the process of gradual dissolution can cause a sinkhole to f...
Sinkholes are classified in accordance with their formational processes. The rate at which they form is guided by the size of openings though which fluids flow, the head that is driving the flow system and the geochemistry. For example, limestone rocks dissolve when attacked by rainfall or groundwater that is acidic.
There are a number of soluble rocks across the UK that form karst. These include Devonian and Carboniferous limestones, Permian and Triassic halite and gypsum, and Jurassic and Cretaceous limestones and chalk.
Most sinkholes are relatively small or are in upland, rural locations. They include areas underlain by Carboniferous limestone, notably the Mendips, parts of Wales, the Peak District, and the northern Pennines including the Yorkshire Dales. The most susceptible area in the UK, however, is the Permian gypsum deposits of north-east England, particula...
The Red Lake sinkhole in Croatia. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.
Apr 8, 2024 · A sinkhole is basically a hole which appears to suddenly open up in the ground. However, the process that leads to a sinkhole is not so sudden and may have been developing...
Jul 3, 2024 · A sinkhole is a hole in the ground that forms when water dissolves surface rock. Often, this surface rock is limestone, which is easily eroded, or worn away, by the movement of water. In a landscape where limestone sits underneath the soil, water from rainfall collects in cracks in the stone.
Some sinkholes are caused not by dissolution of limestone, but the erosion of weak, unconsolidated material by flowing water. Loose material can removed by a process called ‘soil piping’, creating large voids within the sediment.
Mar 11, 2022 · Sinkhole is a ground that is formed by the collapse of the surface layer and has no external drainage. When it rains, the water stays in the sinkhole. Sinkholes can range from a few feet to hundreds of acres and less than 1 to 100 feet deep.
