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We characterized seafloor sediment conditions near the mouth of the Elwha River from underwater photographs taken every four hours from September 2011 to December 2013. A digital camera was affixed to a tripod that was deployed in approximately 10 meters of water (Tripod location from September 2011 to April 2013: 48.15333, -123.55931; tripod location from April 2013 to December 2013: 48.15407, -123.55444). Each photograph was qualitatively characterized as one of six categories: (1) base, or no sediment; (2) low sediment; (3) medium sediment; (4) high sediment; (5) turbid; or (6) kelp. For base conditions, no sediment was present on the seafloor. Low sediment conditions were characterized by a light dusting of...
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Album caption: Foran party near lower canyon on Noatak River, Alaska. September 20, 1924. Individuals from left to right Belgard, Foran. W.T., Wix, and Hughes.
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Album caption: Same as #50 (Cape Prince of Wales).
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Two marine geological surveys were conducted in Long Island Sound, Connecticut and New York, in fall 2017 and spring 2018 by the U.S. Geological Survey, University of Connecticut, and University of New Haven through the Long Island Sound Mapping and Research Collaborative. Sea-floor images and videos were collected at 210 sampling sites within the survey area, and surficial sediment samples were collected at 179 of the sites. The sediment data and the observations from the images and videos are used to identify sediment texture and sea-floor habitats.
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Album caption: Viewed with Nos. 1037, 1038, 1040, 1041. Panoramic view of Rampart Agricultural Station. Taken from Rampart with long focus lens.
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Two marine geological surveys were conducted in Nantucket Sound, Massachusetts, in May 2016 and May 2017 by the U.S. Geological Survey as part of an agreement with the Massachusetts Office of Coastal Zone Management to map the geology of the sea floor offshore of Massachusetts. Samples of surficial sediment and photographs of the sea floor were collected at 76 sampling sites within the survey area, and sea-floor videos were collected at 75 of the sites. The sediment data and the observations from the photos and videos are used to explore the nature of the sea floor; in conjunction with high-resolution geophysical data, the observations are used to make interpretive maps of sedimentary environments and validate acoustic...


    map background search result map search result map Foran party near lower canyon on Noatak River, Alaska. 1924. Characterization of seafloor photographs near the mouth of the Elwha River during the first two years of dam removal (2011-2013) Cape Prince of Wales. Alaska. ca. 1923. View of Rampart Agricultural Station. Alaska. ca. 1924. 1975 Upper Mississippi River System Color Infrared Aerial Photographs: Pool 05 Sea-Floor Sediment and Imagery Data Collected in Long Island Sound, Connecticut and New York, 2017 and 2018 Sea-Floor Sediment and Imagery Data Collected in Nantucket Sound, Massachusetts, 2016 and 2017 Characterization of seafloor photographs near the mouth of the Elwha River during the first two years of dam removal (2011-2013) Sea-Floor Sediment and Imagery Data Collected in Nantucket Sound, Massachusetts, 2016 and 2017 1975 Upper Mississippi River System Color Infrared Aerial Photographs: Pool 05 Foran party near lower canyon on Noatak River, Alaska. 1924. Cape Prince of Wales. Alaska. ca. 1923. View of Rampart Agricultural Station. Alaska. ca. 1924.