This layer is a georeferenced raster image showing the sediment-thickness map of the Santa Barbara Channel region in California. This sediment-thickness map of the Santa Barbara Channel is published in Scientific Investigations Map 3225, "California State Waters Map Series--Hueneme Canyon and Vicinity, California" (see sheet 9). As part of the USGS's California Seafloor Mapping Program, a 50-m grid of sediment thickness for the seafloor within the 3-nautical-mile limit of California's State Waters from the Offshore of Refugio Beach map area to the Hueneme Canyon and vicinity map area was generated from seismic-reflection profile data, collected in 2007 (USGS cruise Z-3-07-SC) and 2008 (USGS cruise S-7-08-SC), supplemented with outcrop and geologic structure data (see sheets 8, 10, SIM 3225). The resulting grid covers an area of approximately 600 sq km. The volume of sediment accumulated since the Last Glacial Maximum is approximately 9,000 million cubic meters. 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. 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. U.S. Geological Survey. (2013). Sediment Thickness: Santa Barbara Channel, California, 2009. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/ht607nx8793. Sediment thickness and volume within each of the map areas: > 62 (Offshore of Refugio Beach) -120.19308, 34.37821, -119.99299, 34.54394 > 63 (Offshore of Coal Oil Point) -120.00703, 34.33620, -119.80704, 34.50193 > 64 (Offshore of Santa Barbara) -119.81596, 34.32279, -119.61634, 34.48824 > 65 (Offshore of Carpinteria) -119.62566, 34.28801, -119.42646, 34.45318 > 66 (Offshore of Ventura) -119.44808, 34.21495, -119.24937, 34.37985 > 67 (Hueneme Canyon and vicinity) -119.33785, 34.05822, -119.13973, 34.22296 > volume > map ------sediment thickness------ area (million > block MIN MAX MEAN STD (sq km) cu m) > 62 0.0 12.3 2.7 2.8 97 258 > 63 0.0 16.6 4.0 4.1 100 402 > 64 0.0 15.5 3.1 3.2 99 308 > 65 0.0 45.0 10.9 9.5 97 1060 > 66 0.0 56.6 34.1 12.9 105 3584 > 67 19.0 48.6 36.0 5.2 95 3421 > Total 594 9034 Additional information about the field activities from which this data set was derived are available online at > http://walrus.wr.usgs.gov/infobank/z/z307sc/html/z-3-07-sc.meta.html > http://walrus.wr.usgs.gov/infobank/s/s708sc/html/s-7-08-sc.meta.html Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.