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  2. Sinkhole - Wikipedia

    en.wikipedia.org/wiki/Sinkhole

    The Red Lake sinkhole in Croatia. 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.

  3. Depression (geology) - Wikipedia

    en.wikipedia.org/wiki/Depression_(geology)

    Sinkhole: a depression formed as a result of the collapse of rocks lying above a hollow. This is common in karst regions. Kettle: a shallow, sediment-filled body of water formed by melting glacial remnants in terminal moraines. [3] Thermokarst hollow: caused by volume loss of the ground as the result of permafrost thawing. Impact-related:

  4. Great Blue Hole - Wikipedia

    en.wikipedia.org/wiki/Great_Blue_Hole

    Lighthouse Reef as seen from space. The Great Blue Hole is near the center of the photo­graph. The Great Blue Hole is a large marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, 318 m (1,043 ft) across and 124 m (407 ...

  5. Scientists Are Planning on Plunging Into the World’s ‘Portal ...

    www.aol.com/scientists-planning-plunging-world...

    Sinkholes filled with water, also known as blue holes, completely surround the island nation of The Bahamas, and now OceanGate’s co-founder wants to explore the deepest of them all.

  6. Debris flow - Wikipedia

    en.wikipedia.org/wiki/Debris_flow

    In all cases the chief conditions required for debris flow initiation include the presence of slopes steeper than about 25 degrees, the availability of abundant loose sediment, soil, or weathered rock, and sufficient water to bring this loose material to a state of almost complete saturation (with all the pore space filled). Debris flows can be ...

  7. Sinkhole opens up between homes in retirement community

    www.aol.com/news/2014-04-24-sinkhole-opens-up...

    The sinkhole was about 65 feet wide and and 75 feet deep. Crews have now filled the hole with dirt and plan on monitoring it to see if it grows any more. WJXT notes sinkholes have become a regular ...

  8. Kettle (landform) - Wikipedia

    en.wikipedia.org/wiki/Kettle_(landform)

    The ice becomes buried in the sediment and when the ice melts, a depression is left called a kettle hole, creating a dimpled appearance on the outwash plain. Lakes often fill these kettles; these are called kettle hole lakes. Another source is the sudden drainage of an ice-dammed lake and when the block melts, the hole it leaves behind is a kettle.

  9. Ocean City sinkhole: How are they formed, and what can cause ...

    www.aol.com/ocean-city-sinkhole-cause-them...

    A sinkhole was discovered at on Wednesday evening near the base of Ocean City's Isle of Wight Bay Bridge, Route 90. Here's what caused it, plus more.