Seismic expression of solution collapse features from the Florida Platform

A variety of subterranean solution collapse features have been identified from very high-resolution seismic reflection profiles collected in Crooked Lake (Central Florida Highlands) and the St. Johns River (northeast Florida). The seismic data have been correlated to adjacent borehole sites for stratigraphic control. Collectively, these data demonstrate that dissolution within several different lithostratigraphic units of the relict Florida carbonate platform has produced at least 3 distinct subbottom solution features: (1) deep, narrow, cylindrical shafts, tens to a hundred meters wide and tens of meters deep; (2) broad solution valleys showing vertical displacements of greater than 10 meters of relief stretched across a horizontal distance of 1 to 5 km; and (3) large-scale, cavern-collapse features several hundred meters wide and of undetermined depth. The type of solution feature constructed appears to be largely determined by which of the many aquifers within the Florida Platform has actively undergone dissolution.