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There are several different types of sinkhole (also known as dolines) caused by different processes, including dissolution, collapse and erosion. Dissolution. Some sinkholes result from the surface dissolution of soluble rock. For example, limestone rocks dissolve when attacked by rainfall or groundwater that is acidic. Soluble rocks in the UK.
Although a natural process, the formation of sinkholes is often accelerated or triggered by human influences, such as broken drains, water mains and sewerage pipes, or modified drainage and diverted surface water; these wash sediment into the underlying materials, causing subsidence.
Sinkholes typically form when naturally acidic rainwater erodes underlying bedrock, creating damage beneath the surface. Their formation is most common in easily erodible karst terrains...
- Dina Fine Maron
Dec 18, 2014 · But what exactly is a sinkhole and how and why do they open up? Sinkholes can take thousands of years to form and usually happen when rock underneath the ground is dissolved by acid...
Mar 4, 2013 · The acidic water causes the erosion of the soluble rock layers beneath the surface - eventually creating cavernous spaces. The soil or sand over the limestone collapses into a sinkhole when...
Most sinkholes are caused by karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. [1][5] Sinkholes are usually circular and vary in size from tens to hundreds of meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms.
Jan 14, 2020 · Water. "The main trigger for sinkholes is water," says Dr Edmonds. "In 90% of sinkhole cases, water saturating the ground is the main trigger, known as Karst processes." "Sinkholes happen when a layer of rock underneath the ground is dissolved by water.
