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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.
A sinkhole is a depression in the ground with no external drainage, often caused by dissolution of soluble rocks. Learn more about sinkhole formation, types, and examples from the USGS Water Science School.
Learn what causes sinkholes to form, how they differ, and where they occur. See stunning photos of sinkholes around the world, from Florida to China.
- Dina Fine Maron
3 days ago · Learn what a sinkhole is, how it forms, and where it occurs. Find out about different types of sinkholes, such as cenotes and caves, and their effects on the environment and people.
A sinkhole is a closed natural depression in the ground surface caused by removal of material below the ground and either collapse or gradual subsidence of the surface into the resulting void. A pothole is usually a fairly small feature caused by failure of paving materials, usually associated with roads, parking lots, and airports.
Jan 19, 2016 · What: A sinkhole 2m wide appeared in the centre lane of Clementi Road towards West Coast Road, with one motorcyclist claiming that he fell into it and suffered minor injuries. Why: No reasons...
A sinkhole is an area of ground that has no natural external surface drainage--when it rains, the water stays inside the sinkhole and typically drains into the subsurface. Sinkholes can vary from a few feet to hundreds of acres and from less than 1 to more than 100 feet deep.
