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  2. List of sinkholes - Wikipedia

    en.wikipedia.org/wiki/List_of_sinkholes

    Bottomless Lakes State Park – Lazy Lagoon Lake, New Mexico, made up of three separate sinkholes; Cedar Sink – a vertical-walled large depression in Kentucky. Daisetta, Texas – sits on a salt dome, in 1969, 1981, and again in 2008, sinkholes formed in the area; Deep Lake (Florida) – a natural sinkhole in Big Cypress National Preserve in ...

  3. Xiaozhai Tiankeng - Wikipedia

    en.wikipedia.org/wiki/Xiaozhai_Tiankeng

    The Tiankeng formed over the Difeng cave, which in turn had been formed by a powerful underground river which still flows underneath the sinkhole. The underground river starts in the Tianjin fissure gorge and reaches a vertical cliff above the Migong River, forming a 46-metre-high (151-foot) waterfall. The length of this underground river is ...

  4. Sinkhole - Wikipedia

    en.wikipedia.org/wiki/Sinkhole

    This large vertical hole is not a true sinkhole, as it did not form via the dissolution of limestone, dolomite, marble, or any other water-soluble rock. [51] [52] Instead, they are examples of "piping pseudokarst", created by the collapse of large cavities that had developed in the weak, crumbly Quaternary volcanic deposits underlying the city ...

  5. A sinkhole may have swallowed a Pennsylvania woman. What are ...

    www.aol.com/know-sinkholes-pennsylvania-woman...

    A large sinkhole opened up in 2020 in South Dakota near where a man was mowing his lawn. Testing revealed a large, improperly sealed mine beneath part of the housing subdivision, and a 40-foot ...

  6. Huge 60ft-deep sinkhole opens up in quiet residential cul-de-sac

    www.aol.com/huge-60ft-deep-sinkhole-opens...

    The cause of the sinkhole has not been confirmed, but a local councillor told the BBC that it was believed a culvert - a structure that allows water to flow under roads - had collapsed, creating ...

  7. How dangerous are sinkholes? What to know amid search for ...

    www.aol.com/news/dangerous-sinkholes-know-amid...

    Sinkholes can range in size from a few feet wide to hundreds of acres, and anywhere from 1 to 100 feet or more deep. Sinkholes can swallow up cars, parts of roads and even houses.

  8. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]

  9. 30-foot-deep sinkhole opens inches from earlier sinkhole on ...

    www.aol.com/news/30-foot-deep-sinkhole-opens...

    A 30-foot-deep sinkhole formed along an Oregon coastline inches away from one that appeared months earlier, park officials said. The second sinkhole, which is 10 feet wide, appeared Monday, May 8 ...