A high-resolution geological and geophysical investigation of the Dry Tortugas carbonate depositional environment |
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| Authors: | D Mallinson S Locker M Hafen D Naar A Hine D Lavoie S Schock |
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| Institution: | (1) Department of Marine Science, University of South Florida, St. Petersburg, FL 33701, USA, US;(2) Seafloor Geosciences Division, Naval Research Laboratory, Stennis Space Center, MS 39529, USA, US;(3) Department of Ocean Engineering, Florida Atlantic University, Boca Raton, FL 33431, USA, US |
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| Abstract: | Geophysical surveys and ground truth data are compared from a site in the Dry Tortugas, Florida. Seismic data reveal six
depositional sequences bounded by high-amplitude reflectors interpreted as subaerial unconformities. Chirp sonar data reveal
structure within the Holocene depositional sequence that is correlated to ground truth data. Sedimentary units within the
Holocene sequence record a transition from a low-energy, lagoonal environment, to a high-energy, shallow marine environment,
to a moderate-energy, slightly deeper marine environment. Forward modeling and impedance inversion reveal good agreement between
sediment physical properties, acoustic properties measured by the electric logger, and the chirp sonar data. |
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