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.
| 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 |
| Google Analytic Metrics | Metrics page |