karst terrain sinkholes

[Plane]

http://www.usgs.gov/blogs/features/usgs_top_story/the-science-of-sinkholes/


Around 20% of the U.S. lies in areas susceptible to sinkhole events.

[kimba1]

Funny you brought this up

http://abcnews.go.com/news/t/blogEntry?id=18714062&ref=http%3A%2F%2Fwww.google.com%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3Dgolfer%2520sinkhole%26source%3Dweb%26cd%3D1%26sqi%3D2%26ved%3D0CC0QqQIwAA%26url%3Dhttp%253A%252F%252Fabcnews.go.com%252Fblogs%252Fheadlines%252F2013%252F03%252Fgolfer-swallowed-by-sinkhole%252F%26ei%3DtfNFUf-iG-jyyAHSm4DIBA%26usg%3DAFQjCNF4D4rGS5uXc2b1oRkvr7TM9VZLrw%26bvm%3Dbv.43828540%2Cd.aWM