Subtask: Geologic Framework and Holocene Coastal Evolution – Eastern Louisiana Region
Subtask Leader: David Twichell - USGS Woods Hole Science Center for Coastal and Marine Geology, Woods Hole, Massachusetts
Subtask Aim
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| Bathymetry offshore of the Chandeleur Islands collected aboard the research vessel Acadiana
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| Survey tracklines along which geophysical data were collected by the research vessels Gilbert and Acadiana
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Information on the shallow stratigraphy and geologic framework of the inner shelf of the northern Gulf of
Mexico study area is needed to understand its influence on the evolution of this coastal system. Due to the size and geological variability of the study area, the region has been divided into two parts: eastern Louisiana and Mississippi-Alabama.
This subtask addresses the eastern Louisiana region which extends from approximately the birdfoot delta northward nearly to Cat Island. This subtask has a Louisiana state partner, the Barrier Island Comprehensive Monitoring (BICM) project, funded by the Louisiana Department of Natural Resources.
Subtask Activities
The goal of this subtask is to map the late Holocene stratigraphy of the eastern edge of the Mississippi delta system.
The specific objectives are to:
- Refine the facies distribution of this part of the delta system;
- Evaluate the control that facies distribution may have on barrier island location and evolution;
- Assess the response of the various identified facies to modern coastal processes.
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USGS Research Vessel Gilbert
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| Louisiana University Marine Consortium (LUMCON) vessel Acadiana |
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Subtask Publications
Danforth, W.W., Denny, J.F., O’Brien, T.F., Bergeron, E., Twichell, D.C., Worley, C.W., Andrews, B.D., and Irwin, B.J., 2007, USGS shallow water geophysical mapping operations using a new autonomous surface vehicle, in U.S. Hydro 2007, 15-17 May 2008, Norfolk, VA, Hydrographic Society of America.
Denny, J.F., O’Brien, T.F., Bergeron, E., Twichell, D.C., Worley, C.W., Danforth, W.W., Andrews, B.D., and Irwin, B.J., 2006, Advances in shallow-water, high-resolution sea-floor mapping; integrating an autonomous surface vessel (ASV) into nearshore geophysical studies [abstract NS31B-1574]: EOS, Transactions AGU, v. 87, no. 52 Fall meeting suppl.
Denny, J.F., Schwab, W.C., Twichell, D.C., O’Brien, T.F., Danforth, W.W., Foster, D.S., Bergeron, E., Worley, C.W., Irwin, B.J., Butman, B., Valentine, P.C., Baldwin, W.E., Morton, R.A., Thieler, E.R., Nichols, D.R., and Andrews, B.D., 2007, USGS advances in integrated high-resolution sea-floor mapping, in Coastal Sediments '07: Sixth International Symposium on Coastal Engineering and Science of Coastal Sediment Processes: Proceedings, New Orleans, LA, May 13-17, 2007, American Society of Civil Engineers, p. 2487-2500.
Lavoie, D., 2007, Current and future science plans for restoring a resilient coast, in Farris, G.S., Smith, G., Holm, T., Robbins, L., and Demas, C., eds., Science and the storms: the USGS response to the hurricanes of 2005: Lafayette, LA, U.S. Geological Survey, p. 265-269.
Pendleton, E.A., Twichell, D.C., and Baldwin, W.E., 2008, Documenting erosion of the St. Bernard Delta: Past and present [abstract]: Eos, Transactions - American Geophysical Union, v. 89, no. 53, Fall meeting supplement, OS43B-1292.
Twichell, D.C., Baldwin, W.E., Flocks, J.G., Pendleton, E.A., Miner, M.D., and Kulp, M., 2008, Subsurface control on sea-floor erosional processes offshore of the Chandeleur Islands, LA [abstract #1368], in 2008 Ocean Sciences meeting, March 2-7, 2008, Orlando, FL, American Society of Limnology and Oceanography.
Twichell, D.C., Edmiston, L., Andrews, B.D., Stevenson, W., Osterman, L.E., Donoghue, J., and Poore, R.Z., 2008, The development of oyster beds in Apalachicola Bay, FL during the late Holocene [abstract and poster], in Lavoie, D., and Rosen, B., eds., USGS Gulf Coast Science Conference and Florida Integrated Science Center Meeting: Proceedings with Abstracts, October 20-23, 2008, Orlando, FL: St. Petersburg, FL, U.S. Geological Survey Open-File Report 2008-1329, p. 90.
Twichell, D.C., Andrews, B.D., Bergeron, E., Edmiston, L., and Stevenson, W., 2007, Benthic mapping in Apalachicola Bay, FL: Summary of acoustic mapping techniques and findings [abstract], in Coastal GeoTools07 Proceedings, March 5-8, 2007, Myrtle Beach, SC, p. 53.
Twichell, D.C., Flocks, J.G., Miner, M.D., Baldwin, W.E., Pendleton, E.A., Kulp, M., and Georgiou, I.Y., 2008, Assessing the importance of shoreward vs. alongshore sand transport during the late Holocene evolution of the Chandeleur Islands, LA [abstract]: Geological Society of America Abstracts with Programs, v. 40, no. 6, p. 314.
Twichell, D.C., Pendleton, E.A., Baldwin, W.E., and Flocks, J., 2008, Subsurface control on sea-floor erosional processes offshore of the Chandeleur Islands, LA [abstract and poster], in Lavoie, D., and Rosen, B., eds., USGS Gulf Coast Science Conference and Florida Integrated Science Center Meeting: Proceedings with Abstracts, October 20-23, 2008, Orlando, FL: St. Petersburg, FL, U.S. Geological Survey Open-File Report 2008-1329, p. 89.
Denny, JF, Schwab, WC, Twichell, DC, O’Brien, TF, Danforth, WW, Foster, DS, Bergeron, E, Worley, CR, Irwin, BJ, Butman, B, Valentine, PC, Baldwin, WE, Morton, RA, Thieler, ER, Nichols, DR, and Andrews, BD, USGS advances in integrated high-resolution sea-floor mapping: Inner continental shelf to estuaries: Coastal Sediments 2007 Proceedings, v. 3, 14 p.
Twichell, David C., Brian D. Andrews, Brian D., Edmiston, H. Lee, and Stevenson, William R., 2007, Geophysical Mapping of Oyster Habitats in a Shallow Estuary; Apalachicola Bay, Florida, U.S. Geological Survey Open-File Report 2006-1381
Baldwin, W.E., Pendleton, E.A., and Twichell, D.C., Geophysical data from offshore of the Chandeleur Islands, Eastern Mississippi Delta, U.S. Geological Survey Open-File Report 2008-1195 (DVD-ROM)
Danforth, W.W., Denny, J.F., O’Brien, T.F., Bergeron, E., Twichell, D., Worley, C.R., Andrews, B.D., and Irwin, B., 2007, USGS shallow water geophysical mapping operations using a new autonomous surface vehicle: U.S. Hydro 2007, Norfolk, VA, Conference Proceedings, CD-ROM 4
Twichell, D.C., Pendleton, E.A., Baldwin, W.E., and Flocks, J., 2009, Subsurface control on sea-floor erosional processes offshore of the Chandeleur Islands, Louisiana: Geo-Marine Letters, v. 29, no. 6, p. 349-358.
Rogers, B., and Kulp, M.A., 2009, Late Holocene chronology, origin, and evolution of the St. Bernard Shoals, northern Gulf of Mexico, USA: Geo-Marine Letters, v. 29, no. 6, p. 379-394.
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URL of this page is: http://ngom.usgs.gov/task2_1/index.html