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The AAPG/Datapages Combined Publications Database
CSPG Special Publications
Abstract
Tidal Sand Ridges, Southwest Florida
Abstract
The linear ridges south of Cape Romano on the inner shelf off southwest Florida appear to represent small-scale analogs to the well-known tidal ridges in the North Sea. The overall size, shape, and morphodynamics appear similar in all respects; however, the stratigraphy cannot, as yet, be compared due to the absence of data from the North Sea.
The Florida sand ridges are unquestionably tide-dominated at present. They are comprised of well-sorted quartz sand with little shell debris and the mean grain-size coarsens upward. Cross-stratification is present but subtle. The ridge lithofacies overlies a shelly and muddy quartz sand lithofacies which is also Holocene in age. There is no indication of significant migration of the ridges over at least a century and no ridge-type lithofacies has been found in the subsurface of this region.
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