Depth to Transition: Santa Barbara Channel, California, 2009

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Abstract/Contents

Abstract
This layer is a georeferenced raster image of the depth to transition (base) map of uppermost Pleistocene and Holocene sediments in the Santa Barbara Channel in California. As part of the USGS's California State Waters Mapping Project, a 20-m grid of depth to the transgressive surface of the last glacial maximum (LGM) was generated for the areas within the 3-nautical mile limit of the channel. The depth to base of the post-LGM unit was generated by adding sediment thickness data to water depths determined by multibeam bathymetry. The resulting grid covers an area of approximately 600 sq km. The depth to the transgressive surface of the LGM ranges between 12 and 190 meters. A map that shows these data is published in Scientific Investigations Map 3225, "California State Waters Map Series--Hueneme Canyon and Vicinity, California." This layer is part of USGS Data Series 781.
Purpose
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.

Description

Type of resource cartographic, software, multimedia
Form Raster Dataset
Place Santa Cruz, California, US
Publisher Geological Survey (U.S.)
Date valid 2007 - 2009
Publication date 2012
Edition version 1
Language English
Digital origin born digital
Map data Scale not given. ; Custom projection W 120°11ʹ47ʺ--W 119°8ʹ22ʺ/N 34°29ʹ31ʺ--N 34°2ʹ21ʺW 120°11ʹ47ʺ--W 119°8ʹ23ʺ/N 34°29ʹ31ʺ--N 34°2ʹ22ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Wong, Florence L.
Creator Phillips, Eleyne L.
Creator Johnson, Samuel Y.
Creator Pacific Coastal and Marine Science Center
Creator Golden, Nadine E.

Subjects

Subject Coasts
Subject Sediments (Geology)
Subject Marine sediments
Subject Ocean bottom
Subject Seismic reflection method
Subject California
Subject Santa Barbara County (Calif.)
Subject Pacific Ocean
Subject Santa Barbara Channel (Calif.)
Subject 2007-2009
Subject Oceans
Subject Elevation
Subject Imagery and Base Maps
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information Depth to transgressive surface of Last Glacial Maximum in individual map blocks: > 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 > map area depth to transgressive surface > block (sq km) MIN MAX MEAN STD > 62 97 -101.8 -22.6 -61.9 16.5 > 63 100 -190.0 -14.7 -67.4 29.0 > 64 99 -78.8 -12.5 -48.8 17.4 > 65 97 -83.9 -12.2 -40.6 15.0 > 66 105 -87.9 -12.0 -55.2 17.3 > 67 110 -169.5 -42.5 -61.4 14.7 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.
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/tc454hf8477

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

U.S. Geological Survey. (2013). Depth to Transition: 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/tc454hf8477.

Collection

California State Waters Map Series Data Catalog

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