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Saturday, April 20, 2013

Video: ✔What's Inside A Sinkhole?





✔What's Inside A Sinkhole?
SOURCE...
http://www.cnn.com/video/


A sinkhole, also known as a sink, snake hole, swallow hole, swallet, or doline, is a natural depression or hole in the Earth's surface caused by karst processes—for example, the chemical dissolution of carbonate rocks or suffosion processes in sandstone. Sinkholes may vary in size from 1 to 600 metres (3.3 to 2,000 ft) both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may be formed gradually or suddenly, and are found worldwide. The different terms for sinkholes are often used interchangeably.

FAIR USE NOTICE: These pages/video may contain copyrighted (© ) material the use of which has not always been specifically authorized by the copyright owner. Such material is made available to advance understanding of ecological, POLITICAL, HUMAN RIGHTS, economic, DEMOCRACY, scientific, MORAL, ETHICAL, and SOCIAL JUSTICE ISSUES, etc. It is believed that this constitutes a 'fair use' of any such copyrighte...




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