Rapid sediment deposition and fine-scale strata formation in the Hudson estuary
Traykovski, Peter A.
Geyer, W. Rockwell
Sommerfield, Christopher K.
MetadataShow full item record
A 9 month time series of tripod-mounted optical and acoustic measurements of sediment concentration and bed elevation was used to examine depositional processes in relationship to hydrodynamic variables in the Hudson River estuary. A series of cores was also taken directly under and adjacent to the acoustic measurements to examine the relation between the depositional processes and the resulting fine-scale stratigraphy. The measurements reveal that deposition occurs as a result of sediment flux convergence behind a salinity front and that the accumulation rates are sufficient to deposit up to 25 cm of new high-porosity sediment in a single ebb-tidal phase. Subsequent dewatering and erosion reduces the thickness of the initial deposit to several centimeters. These depositional events were only observed on spring tides. Ten depositional events during two spring tidal cycles produced a seasonal deposit of 18 cm, consistent with estimates of seasonal deposition from cores. A proxy for near-bed suspended grain size variations was estimated from the combined acoustic and optical measurements, implying that the erosional processes resuspend only the finer-grained sediments, thus leaving behind silt and very fine grained sand beds. The thickness of the deposited homogenous clayey silt beds, and the vertical separation between beds interlaminated with silt and very fine sand, are roughly consistent with the acoustic measurements of changes in bed elevations during deposition and erosion. The variability in individual bed thickness is the result of variations of processes over an individual tidal cycle and is not a product of variations over the spring neap fortnightly timescale.
Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 109 (2004): F02004, doi:10.1029/2003JF000096.
Suggested CitationArticle: Traykovski, Peter A., Geyer, W. Rockwell, Sommerfield, Christopher K., "Rapid sediment deposition and fine-scale strata formation in the Hudson estuary", Journal of Geophysical Research 109 (2004): F02004, DOI:10.1029/2003JF000096, https://hdl.handle.net/1912/3740
Showing items related by title, author, creator and subject.
The sediments of the western Gulf of Mexico. I. The continental terrace of the western Gulf of Mexico : its surface sediments, origin, and development. II. Chemical studies of sediments of the western Gulf of Mexico Stetson, Henry C.; Trask, Parker D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1953-05)In 1947 the Woods Hole Oceanographic Institution organized an expedition to investigate the bottom sediments and oceanography of the northwest Gulf of Mexico. The Geological Society of America contributed to the support ...
Povinec, Pavel P.; Pham, Mai Khanh; Sanchez-Cabeza, J. A.; Barci-Funel, G.; Bojanowski, R.; Boshkova, T.; Burnett, William C.; Carvalho, F.; Chapeyron, B.; Cunha, I. L.; Dahlgaard, H.; Galabov, N.; Fifield, L. K.; Gastaud, J.; Geering, J. -J.; Gomez, I. F.; Green, N.; Hamilton, T.; Ibanez, F. L.; Ibn Majah, M.; John, M.; Kanisch, G.; Kenna, Timothy C.; Kloster, M.; Korun, M.; Liong Wee Kwong, L.; La Rosa, J.; Lee, S.-H.; Levy-Palomo, I.; Malatova, M.; Maruo, Y.; Mitchell, P.; Murciano, I. V.; Nelson, Robert K.; Nouredine, A.; Oh, J.-S.; Oregioni, B.; Le Petit, G.; Pettersson, H. B. L.; Reineking, A.; Smedley, P. A.; Suckow, A.; van der Struijs, T. D. B.; Voors, P. I.; Yoshimizu, K.; Wyse, E. (2006-07-11)A reference material designed for the determination of anthropogenic and natural radionuclides in sediment, IAEA-384 (Fangataufa Lagoon sediment), is described and the results of certification are presented. The material ...
Holocene sediment distribution on the inner continental shelf of northeastern South Carolina : implications for the regional sediment budget and long-term shoreline response Denny, Jane F.; Schwab, William C.; Baldwin, Wayne E.; Barnhardt, Walter A.; Gayes, Paul T.; Morton, Robert A.; Warner, John C.; Driscoll, Neal W.; Voulgaris, George (Elsevier B.V., 2013-02-26)High-resolution geophysical and sediment sampling surveys were conducted offshore of the Grand Strand, South Carolina to define the shallow geologic framework of the inner shelf. Results are used to identify and map Holocene ...