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  • Sinkhole - Wikipedia, the free encyclopedia

    http://en.wikipedia.org/wiki/Sinkhole

    A sinkhole, also known as a sink, sink-hole, shakehole, swallet, swallow hole, or
    doline (the different terms for sinkholes are often used interchangeably), is a ...

  • Incredible Sinkholes Around the World Photos - ABC News

    http://abcnews.go.com/International/photos/incredible-sinkholes-world-...

    The sinkhole looks like a twenty foot drop off the side of a steep cliff.

  • Amazing sinkholes | MNN - Mother Nature Network

    http://www.mnn.com/earth-matters/wilderness-resources/photos/13-amazin...

    Some of the most famous sinkholes are seemingly endless pits that swallow trees
    , cars and buildings. Here are some of the world's most fascinating sinkholes.

  • How Sinkholes Work - HowStuffWorks

    http://science.howstuffworks.com/nature/natural-disasters/sinkhole.htm

    Sinkholes are much more than holes in the ground. Learn how sinkholes can
    cause the Earth to swallow up you, your home and your car.

  • Sinkholes - Southwest Florida Water Management District

    https://www.swfwmd.state.fl.us/hydrology/sinkholes/

    Sinkholes are depressions or holes in the land surface that occur throughout
    west-central Florida. They can be shallow or deep, small or large, but all are a ...

  • Sinkhole opens up in Cobb County | www.wsbtv.com

    http://www.wsbtv.com/news/news/local/sinkhole-opens-cob... - 19 hours ago

    19 hours ago ... A 20-foot deep sinkhole has opened up in Cobb County, swallowing trees and
    putting a nearby business on edge.

  • (PDF) Florida's Sinkholes - Florida Department of Environmental Protection

    File Format: PDF/Adobe Acrobat

    http://www.dep.state.fl.us/geology/geologictopics/sinkhole/florida_sin...

    (from Bates and Jackson, Dictionary of Geological terms.) Sinkholes are a natural
    component of Flori- da's landscape. In the simplest sense, sink- holes are ...

  • What are sinkholes and what causes them? | World news | The ...

    http://www.theguardian.com/world/2013/mar/04/what-causes-sinkholes-flo...

    Mar 4, 2013 ... Natural sinkholes – as opposed to manmade tunnel or cave collapses .... At the
    most basic level, people in a sinkhole-prone zone are best ...

  • Sinkholes, from USGS Water-Science School

    https://water.usgs.gov/edu/sinkholes.html

    Jul 17, 2014 ... Sinkholes are common where the rock below the land surface is limestone,
    carbonate rock, salt beds, or rocks that can naturally be dissolved ...

  • Giant sinkhole near Cowshill 'could keep growing' - BBC News

    http://www.bbc.com/news/uk-england-tyne-28927743

    A giant sinkhole in County Durham is causing increasing concern as it threatens
    to get bigger, according to a landowner.