The areas of subsidence seen within the lakes are well constrained and do not have the appearance of large subsidence or collapse sinkholes seen in other lakes. These localized areas of subsidence may lie directly over centers of active karst development. Lake Keene shows some larger solution features at depth in the profiles (type 3, Track Map). These features resemble the subsidence-type features seen in other lakes and could represent a developing sinkhole. Profiles of gamma-log interpretations across Lake Keene (Index Map G, wells L-0677 and L-0679) show the top of the Ocala Limestone dropping from +15 m (+50 ft) NGVD to -3 m (-10 ft) NGVD from north to south. Although shallower, the transition between the consistent low angle reflections in the seismic profiles and the underlying, more jagged reflections (represented by dashed green lines, A-A’ and B-B’) may represent this contact. Likewise, the transition may represent a horizon near the contact between the top of the Hawthorn Group and overlying undifferentiated fill. Dissolution in the Ocala Limestone at depth could lead to subsequent subsidence in the overlying sediments of the Hawthorn Group and the undifferentiated fill, as outlined by the red dashed lines in the seismic profiles.