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Plant Management in Florida's Waters: Sinkholes
Illustrated description of sinkholes, which "originate beneath the surface when groundwater moves through the limestone and erodes large voids, or cavities, in the bedrock." Includes many photos of sinkholes, and links to related essays on karst topography, groundwater, aquifers, springs, and other geology topics. A collaboration of the Center for Aquatic and Invasive Plants, University of Florida, and the Bureau of Invasive Plant Management, Florida Department of Environmental Protection.
http://aquat1.ifas.ufl.edu/guide/sinkholes.html

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