Initial results of high-resolution sea-floor mapping offshore of the New York - New Jersey metropolitan area using sidescan sonar
Northeastern Geology and Environmental Sciences
By: W. C. Schwab, M. A. Allison, W. Corso, L. L. Lotto, B. Butman, Marilyn R. Buchholtz ten Brink, J. F. Denny, W. W. Danforth, and D.S. Foster
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Abstract
High-resolution seismic, sidescan-sonar, multibeam bathymetry, and sediment sampling techniques were used to map the surficial geology and shallow subbottom stratigraphy of a segment of the inner shelf and nearshore region of New York-New Jersey metropolitan area. Preliminary analyses of these data provide a sedimentologic framework for addressing a wide range of science and management issues. Principal features identified include: 1) a series of sharply defined, rippled scour depressions in the nearshore areas of Long Island and New Jersey that are thought to be an erosional pattern indicative of storm-induced cross-shelf sediment-transport processes from the shoreface; 2) outcropping Upper Cretaceous to early Tertiary coastal plain strata and associated gravelly lag deposits; 3 ) morphologic and chemical indications of anthropogenic waste disposal and redistribution; 4) extensive deposits of medium- to fine-grained sand northeast and east of the Hudson Shelf Valley; 5) acoustic backscatter patterns on the sidescan imagery and sediment bedforms that indicate a general south-southwest sediment transport direction toward the Hudson Shelf Valley; and 6) the Hudson Shelf Valley is a depositional site for silty sediment and acts as a conduit for cross-shelf pollutant transport.
Suggested Citation
Schwab, W.C., Allison, M.A., Corso, W., Lotto, L.L., Butman, B., Buchholtz ten Brink, M.R., Denny, J.F., Danforth, W.W., and Foster, D., 1997, Initial results of high-resolution sea-floor mapping offshore of the New York - New Jersey metropolitan area using sidescan sonar: Northeastern Geology and Environmental Sciences, v. 19, no. 4, p. 243-262.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Initial results of high-resolution sea-floor mapping offshore of the New York - New Jersey metropolitan area using sidescan sonar |
| Series title | Northeastern Geology and Environmental Sciences |
| Volume | 19 |
| Issue | 4 |
| Year Published | 1997 |
| Language | English |
| Contributing office(s) | Woods Hole Coastal and Marine Science Center |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Northeastern Geology and Environmental Sciences |
| First page | 243 |
| Last page | 262 |