Side-scan sonar data

Location | Sonar | Sediments Profile | Cross-Section

Projection: UTM, GRS 1980, NAD83, Zone 17. Coordinates: Geographic. Bathymetry (areas > 4 m) after Gelfenbaum and Guy (1999). Coastal areas (< 4 m) represented by Digital Orthophoto Quarter Quadrangle (1995).

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›	Location Map
›	Surface Sediments
›	Seismic-Profile Data
›	Transect Cross-Section

Side-scan sonar imagery overlain on bathymetry reveals a NW-SE trending sand-ridge morphology common throughout the inner shelf in this region. Surface-sediment cover is thin and exhibits a patchy and discontinuous distribution. Low backscatter (light gray) areas correspond to sand ridges and flats dominated by quartz sand. The dark (high backscatter) areas are largely coarse sediment veneer with increased carbonate material (primarily shell debris), or some hardbottoms. Data from a series of six closely spaced side-scan swaths in the nearshore are available only as interpretations of sonar imagery depicting two shades of gray (from Gelfenbaum et al., 1995).