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Figure 1. Location map showing the extent of the study area and the sections surveyed by the autonomous surface vessel IRIS. Heavy black line shows the location of figure 2. |
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Figure 2. Seismic-reflection profile showing four surfaces (lowstand, flooding, base of mud, and pre-dredging sea floor) included in this report. Profile location shown on figure 1. |
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Figure 3. Map showing the core locations in Apalachicola Bay. |
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Figure 4. Map showing the sea-floor surface of Apalachicola Bay prior to the dredging of the Gulf Intracoastal Waterway. |
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Figure 5. Map showing the contact between the base of the modern mud deposit and the underlying middle Holocene estuarine and deltaic deposits in Apalachicola Bay. |
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Figure 6. Map showing the depth to the flooding surface in Apalachicola Bay. |
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Figure 7. Map showing the depth to the lowstand surface in Apalachicola Bay. |
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Figure 8. Photograph of the autonomous surface vessel IRIS. |
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Figure 9. Map showing the comparison between the sea-floor surface generated from (A) gridding swath bathymetry data at the spacing of the seismic shot-point navigation supplemented with interpreted seismic-reflection profiles where swath data were unavailable and (B) the surface generated from all the high-resolution swath bathymetry data (available from Twichell and others, 2007). This comparison provides validity of gridding methods of horizon data at the point spacing of the interpreted seismic-reflection profiles. Part A was created omitting manmade features such as dredge spoils and the Intracoastal Waterway. The color scale used in Part B is the same as in Part A. |
