sinkholes
green cove springs hires help to check danger of sinkholes, Aug 21, 1986
geologists use electric probes to find potential sinkholes (picture), Jul 25, 1986
h. ownbey recalls earlier 1959 sinkhole in keystone heights area, Jan 26, 1986
park of the palms officials look for cause of sinkhole (picture), Jan 01, 1986
pierson sinkhole in volusia county being filled with dirt, Feb 01, 1986
sinkhole at landfill prompts federal investigation, Nov 12, 1986
study reports most sinkholes are caused by man (chart), Jan 21, 1986
soil test completed at 60 ft. keystone heights sinkhole, Jan 21, 1986
geologists learning to judge potential sinkhole areas, Feb 01, 1987
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