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The natural world. Looking pretty for 3.5b years.

That Sinking Feeling

sinkholes occur naturally and can also be induced by human error

Author: Hugh Bollinger/Thursday, March 21, 2013/Categories: natural history, video

Sinkholes are receiving considerable new attention recently. Houses are being swallowed in Florida, duck ponds disappearing in California, and rivers flowing underground in Pennsylvania have been observed.

Crooked Lake Sinkhole (credit: Florida State Government)

Sinkholes develop naturally in underground strata composed of limestone where water flows and the surface collapses from below. The process can also be initiated by human error such as depleting groundwater aquifers by pumping, drilling in fragile salt strata, and building in areas known to be underlain by karst limestone. One of the most famous sinkholes developed from a oil drilling mistake in Louisiana.

The video is impressive, to say the least:

Oil Driller Breaches Salt Mine Under Lake  (credit: History Channel)



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