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Bookmark or Share- Sinkhole - National Geographic SocietyA 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.
- Sinkhole - WikipediaA 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 .
- Sinkholes | U.S. Geological Survey - USGS.govA 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.
- What causes a sinkhole | Department of Environmental Protection ...A sinkhole left open to take more water may continue to grow and can contribute to the appearance of more sinkholes nearby. A sinkhole is not a hole in the rock. A common misunderstanding is to think that a sinkhole is the hole in the rock. Actually, the sinkhole is what we see on the ground surface because of the hole in the rock below.
- What is a sinkhole? | U.S. Geological Survey - USGS.govA 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.”
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