Woods Hole Coastal and Marine Science Center

Multimedia

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Aerial photograph of a Canadian and a US ship in the Arctic Ocean
September 1, 2008

U.S. and Canadian Ships in Arctic Ocean

Helicopter view of Canadian Coast Guard Ship Louis S. St. Laurent (top) and U.S. Coast Guard Cutter Healy (bottom) on the Arctic Ocean. This was during a scientific expedition to map the extended continental shelf in the Arctic Ocean.

Oblique hillshaded-relief view of the bathymetry surrounding Martha’s Vineyard and the Upper Cape
December 31, 2007

Bathymetry surrounding Martha's Vineyard, MA

Oblique hillshaded-relief view of the bathymetry surrounding Martha’s Vineyard and the Upper Cape looking south across Buzzards Bay and Vineyard Sound

shaded-relief bathymetry image of the sea floor offshore of northeastern Massachusetts between Cape Ann and Salisbury Beach
December 31, 2007

Swath Bathymetry

Swath bathymetry and derivative products such as slope, hillshaded relief, and rugosity maps provide information not only on water depth, but also the roughness and smoothness of the sea floor, which correlates with sea floor texture and depositional environment. The shaded-relief bathymetry image of the sea floor offshore of northeastern Massachusetts between Cape Ann and

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Inner continental shelf sediment textures within western Massachusetts Bay
December 31, 2007

Sediment Textures

 Inner continental shelf sediment textures within western Massachusetts Bay classified using Barnhardt and others (1998). Bottom photographs A-D show sediment texture in select locations (photograph locations are shown as white dots on the sediment texture map). Grain size statistics are plotted as pie charts showing the relative percentages of gravel, sand, and mud. A, A

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Chart of data input heirarchy
December 31, 2007

Data input heirarchy

Sediment texture and distribution data were mapped qualitatively in Esri ArcGIS using a hierarchical methodology. Backscatter data were the first input, followed by bathymetry, surficial geologic and shallow stratigraphic interpretations, and photograph and sample databases. DEM, digital elevation model.

Image showing bathymetry of the southern Gulf of Maine with MA coastal zone boundary
December 31, 2007

Southern Gulf of Maine and Massachusetts coastal zone bathymetry

Image showing the bathymetry of the southern Gulf of Maine with the Massachusetts coastal zone boundary outlined in grey. The images on the right display how the geophysical and sample data are combined to create an interpretation of seafloor geology

Image showing the bathymetry of the southern Gulf of Maine with the Massachusetts coastal zone boundary outlined in grey.
December 31, 2007

Bathymetry of southern Gulf of Maine and Massachusetts coastal zone

Bathymetry of of the southern Gulf of Maine with the Massachusetts coastal zone boundary outlined in grey.