Fig.2- Early stage in the development
 of a cover collapse sink.

Fig.3- Final stage, cover collapse sink development.

Fig.4- Cover collapse sink in metropolitan
 Orlando.

Fig.5- Development of subsidence sink.

Fig.6- Overburden subsidence sink near
 Brooksville.

Fig.7- Development of ultimate overburden subsidence sink.

Fig.8- Overburden subsidence sinkhole,
 Winter Park.