Sources and more information
• Sinkholes, USGS Fact Sheet 2007-3060
• Land Subsidence in the United States, U.S. Geological Survey Circular 1182
• Land Subsidence in the United States, USGS Fact Sheet-165-00
• Carbonate-rock aquifers, Aquifer Basics
• Land Subsidence in the United States, U.S. Geological Survey Circular 1182
• Land Subsidence in the United States, USGS Fact Sheet-165-00
• Carbonate-rock aquifers, Aquifer Basics
See HERE
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