Florida Geological Survey - Hazards - Landslides
Landslides are very rare in
Florida, a state generally known to be fairly flat (characterized by low
topographic relief.) Gravity is the force that is responsible for
landslides. In areas where there are steep slopes, unconsolidated soils
and sediments may move downward. This movement may be too slow to
notice, in which case it is called soil creep. If the movement is sudden
and catastrophic, it is referred to as a landslide or slump. Landslides
may be associated with excessive amounts of rain that lead to saturation
of earth materials by water. The steepening of slopes by erosion or
construction may also be a factor in the development of landslides.
The only documented landslide in Florida occurred in
Gadsden County, which is located in the northern Florida panhandle, on
April 1, 1948 on the farm of Mr. D. W. Pitt. The slide was located on an
upland bounded by a very steep north-facing slope. That north-facing
slope formed the south bank of Flat Creek. Soil and unconsolidated
sediment flowed downhill in a northeasterly direction into the stream
bed of Flat Creek. Although the slide was not extensively investigated,
it may have been triggered by the flow of flood-swollen Flat Creek.