Depth to Transition: Bolinas to Pescadero, California, 2010

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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 region of Bolinas to Pescadero in California. As part of the USGS's California State Waters Mapping Project, a 50-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 between Bolinas and Pescadero. Information for 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 550 sq km. The depth to the transgressive surface of the LGM ranges between 4 and 78 meters. The depth-to-transition map is published in Scientific Investigations Map 3306, "California State Waters Map Series--Offshore San Gregorio, California" (see sheet 9).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
Publisher Geological Survey (U.S.)
Date valid 2007 - 2010
Publication date 2014
Language English
Digital origin born digital
Map data Scale not given. ; Custom projection W 122°47ʹ11ʺ--W 122°24ʹ11ʺ/N 37°56ʹ43ʺ--N 37°13ʹ47ʺW 122°47ʹ11ʺ--W 122°24ʹ12ʺ/N 37°56ʹ43ʺ--N 37°13ʹ47ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Pacific Coastal and Marine Science Center
Creator Chin, John L.
Creator Johnson, Samuel Y.
Creator Ross, Stephanie L.
Creator Sliter, Ray W.

Subjects

Subject Coasts
Subject Sediments (Geology)
Subject Marine sediments
Subject Ocean bottom
Subject Seismic reflection method
Subject California
Subject San Mateo County (Calif.)
Subject Marin County (Calif.)
Subject Pacific Ocean
Subject 2007-2010
Subject Imagery and Base Maps
Subject Oceans
Subject Environment
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

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/ys659mz1893

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

Johnson, S.Y., Hartwell, S.R., Sliter, R.W., Watt, J.T., Phillips, E.L., Ross, S.L., Ross, S. L., and Chin, J.L. (2014). Depth to Transition: Bolinas to Pescadero, California, 2010. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/ys659mz1893

Collection

California State Waters Map Series Data Catalog

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