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  1. Sinkhole - Wikipedia

    A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer.

  2. What is a sinkhole? | U.S. Geological Survey - USGS.gov

    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 …

  3. The rise of sinkholes: How to spot the risks before disaster strikes

    2 days ago · The sinkhole above an abandoned mine where a woman fell to her death in December 2024 in Marguerite, Pa. (AP Photo/Matt Freed) What causes sinkholes? Sinkholes …

  4. Sinkhole | Karst, Subsidence & Collapse | Britannica

    2 days ago · Sinkhole, topographic depression formed when underlying limestone bedrock is dissolved by groundwater. It is considered the most-fundamental structure of karst topography.

  5. Sinkholes: What They Are, How They Form, And Their Potential …

    Mar 9, 2025 · Sinkholes are sudden depressions or holes that appear on the Earth’s surface when the ground collapses. These phenomena can cause significant damage to infrastructure and …

  6. Sinkhole - National Geographic Society

    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 …

  7. What causes a sinkhole to form? - National Geographic

    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 …

  8. What causes sinkholes, and why are they so dangerous?

    Dec 4, 2024 · A sinkhole is a hole or deep depression in the ground that opens up when layers of certain types of rock – usually limestone, carbonate rock and salt beds – dissolve beneath the …

  9. Sinkhole Facts - Science Notes and Projects

    Mar 12, 2025 · Get sinkhole facts in geology. Learn about the different types of sinkholes, how they form, and how to repair or escape from one.

  10. What Are Sinkholes and How Do They Form in Our Landscape

    A sinkhole is defined as a depression or hole in the ground caused by the collapse of a surface layer. They are particularly common in regions with karst topography, where the bedrock is …