Backscatter A (8101): Offshore of Point Reyes, California, 2010
- Mercedes D. Erdey, Rikk G. Kvitek, Peter Dartnell, Pacific Coastal and Marine Science Center, and Golden, Nadine E.
- This layer is a georeferenced raster image containing acoustic-backscatter data for the offshore region of Point Reyes, California. The map that show these data are published in Open-File Report 2015-1114, "California State Waters Map Series—Offshore of Point Reyes, California." This layer is part of USGS Data Series 781.In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. This coverage can be used to to aid in assessments and mitigation of geologic hazards in the coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
- Geological Survey (U.S.)
- California, Marin County (Calif.), Drakes Bay (Calif.), and Pacific Ocean
- Coasts, Submarine topography, Submarine geology, Ocean bottom, Seismic reflection method, Imagery and Base Maps, Oceans, Environment, and Geoscientific Information
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