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Coastal & Marine Geology Program > St. Petersburg Coastal and Marine Science Center > West-Central Florida Coastal Studies Project

West-Central Florida Coastal Studies Project

West-Central Florida Coastal Studies Home
Virtual Field Trip:
Introduction
Anclote Key
Three-Rooker Bar
Dunedin Pass
Sand Key
St. Pete Beach
Mullet and Egmont Keys
Anna Maria Island
Longboat and Lido Keys
Venice Inlet
Contact:
Chief Scientist

Virtual Field Trip - Anna Maria Island

map of west-central Florida study area
Anclote Key Three-Rooker Bar Dunedin Pass Sand Key St. Pete Beach Mullet and Egmont Keys Longboat and Lido Keys Venice Inlet

Sample Bathymetry Profile

This plot is an example of a bathymetric survey that clearly shows the transverse bars. The bathymetry was collected on lines that run approximately perpendicular to the transverse bars.

Cross section showing location of transverse bars is not controlled by underlying geologic features.The cross-section (shown left) shows that the location of the transverse bars is not controlled by underlying geologic features. The ridges of the bars consist of fine sands, while the troughs contain coarser, shelly deposits. Click for larger image.

trasverse bar asymmetryThis plot (shown right), based on analysis of the 1994 bathymetry survey shows that the transverse bars tend to have a greater slope on their southern side, suggesting they are moving towards the south. Without repeat bathymetric surveys, we do not know if this feature is maintained throughout the year, or if it is a seasonal or post-storm feature. Click for larger image.

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Migration of Southern Limit
This plot shows migration rates for the southern limit of the transverse bar field, based on an analysis of historical aerial photographs.

Also see these related abstracts:

Coastal & Marine Geology Program > St. Petersburg Coastal and Marine Science Center > West-Central Florida Coastal Studies Project > Virtual Field Trip > Anna Maria Island


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Updated May 06, 2013 @ 09:24 AM  (JSS)