http://plants.ifas.ufl.edu/guide/sinkholes.html
This site was about the sinkholes in Florida are formed overtime and also karst topography. The title of this site is Sinkhole.
Http://www.wptv.com/content/news/topstories/story/sinkhole-I-4-Florida-hillsboroughcounty/rxvXEru6-EifrzHg5UTPcQ.cspx
This site was about sinkholes in Florida and how they worsen and appear in coller temperatures. The title of this site is Spate of Sinkholes Open up in Florida.
Sinkholes are caused by ground water moving through limestone in the ground, erodeing large void. When water fills the void it supports the walls and ceiling when the water drops the void gets more eroded creating the void to collapse. Florida has so many sinkholes becuase of its karst topography. Sinkholes worsen and appear in cold temps because farmers growing crops pump groundwater from wells and spray it over the crops, the water level decreases because of what the farmers have done to the plants. Besides property damage, another hazard associated with sinkholes is they contaminate groundwater.
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