entirety of Florida sits on a bed of limestone common in Florida depending on the thickness of that upper strata depending on the thickness of that upper strata common in Florida entirety of Florida sits on a bed of limestone common in Florida Florida Geological Survey - Hazards â Sinkholes common in Florida Florida Geological Survey - Hazards â Sinkholes common in Florida common in Florida common in Florida common in Florida Florida Geological Survey - Hazards â Sinkholes common in Florida experts from the Florida Geological Survey