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publications > paper > regional Quarternary submarine geomorphology
Regional Quaternary submarine geomorphology in the Florida Keys
U.S. Geological Survey, 600 Fourth Street South, St. Petersburg, Florida 33701, USA
Aerial photographs provide information on the seabed surface, much of which is below seismic resolution. The photographs define a prominent, regional nearshore rock ledge that extends ~2.5 km seaward from the keys' shoreline. They show that bands of rock ridges exist along the outer shelf and on the upper-slope terrace. The photographs also reveal four tracts of outlier reefs on the terrace, one more than had been documented seismically. Seismic and photographic data indicate the tracts are >200 km long, nearly four times longer than previously thought. New interpretations provide insights into a youngest possible terrace age (ca. 175 ka?) and the likelihood that precise ages of oxygen isotope substage 5e oöid tidal-bar and coral reef components may differ. The tidal-bar/reef complex forms the Florida Keys.
Keywords: contour maps, coral reefs, Florida Keys, geophysical investigations, outliers, regional sea-level changes.
U.S. Department of the Interior, U.S. Geological Survey
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Last updated: 04 September, 2013 @ 02:04 PM(KP)
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