Context

Context of Bathymetric map : Oregon, Umpqua River to Cape Ferrelo (surficial bottom sediments issue), bathymetry compiled from NOS hydrographic surveys dated 1889 to 1928 supplemented by hydrographic information from other sources ; surficial bottom sediments compiled by the OSU Department of Oceanography and the NOAA Sea Grant Marine Advisory Service, from Oregon State University and National Ocean Survey data, (electronic resource)
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