Filters: Tags: marine sediments (X) > Types: OGC WMS Layer (X)

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Digital seafloor images and sediment grain size from the mouth of the Columbia River, Oregon and Washington, 2014 Geo-referenced digital imagery of in-situ seafloor sediments in the mouth of the Columbia River was collected and analyzed to determine median grain size of the surface sediments. Digital imagery of the seafloor was collected with a “flying eyeball” (Rubin and others, 2007) from the R/V Parke Snavely from September 11 to September 13, 2014 (USGS Field Activity 2014-642-FA). The flying eyeball consists of a standard definition plumbing inspection video camera and LED light ring inserted in a 50 kg wrecking ball. The video camera has a resolution of 480 by 720 pixels with a resolution of 0.009 mm/pixel when the target is flush against the exterior surface of the lens. Sample locations were chosen to allow for the... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Columbia River, Marine Geology, State of Oregon, State of Washington, Substrate, All tags... estuarine processes, geology, geoscientificInformation, geospatial datasets, marine sediments, oceans, sediment, sediment transport, sediment transport, underwater photography, video observation, videography, Fewer tags