Skip Links

USGS - science for a changing world

Open-File Report 2014–1234

Prepared in cooperation with the National Oceanic and Atmospheric Administration

Bathymetry, Acoustic Backscatter, and Seafloor Character of Farallon Escarpment and Rittenburg Bank, Northern California

By Peter Dartnell, Guy R. Cochrane, and David P. Finlayson

Thumbnail of and link to report PDF (5.6 MB)Abstract

In 2011, scientists from the U.S. Geological Survey’s Coastal and Marine Geology Program acquired bathymetry and acoustic-backscatter data along the upper slope of the Farallon Escarpment and Rittenburg Bank within the Gulf of the Farallones National Marine Sanctuary offshore of the San Francisco Bay area. The surveys were funded by the National Oceanic and Atmospheric Administration’s Deep Sea Coral Research and Technology Program to identify potential deep sea coral habitat prior to planned sampling efforts. Bathymetry and acoustic-backscatter data can be used to map seafloor geology (rock, sand, mud), and slope of the sea floor, both of which are useful for the prediction of deep sea coral habitat. The data also can be used for the prediction of sediment and contaminant budgets and transport, and for the assessment of earthquake and tsunami hazards. The surveys were conducted aboard National Oceanic and Atmospheric Administration’s National Marine Sanctuary Program’s 67-foot-long research vessel Fulmar outfitted with a U.S. Geological Survey 100-kHz Reson 7111 multibeam-echosounder system. This report provides the bathymetry and backscatter data acquired during these surveys, interpretive seafloor character maps in several formats, a summary of the mapping mission, maps of bathymetry and backscatter, and Federal Geographic Data Committee metadata

First posted November 24, 2014

For additional information, contact:
Pacific Science Center
U.S. Geological Survey
400 Natural Bridges Drive
Santa Cruz, CA 95060
http://walrus.wr.usgs.gov/

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge. More information about viewing, downloading, and printing report files can be found here.


Suggested citation:

Dartnell, P., Cochrane, G.R., and Finlayson, D.P., 2014, Bathymetry, acoustic backscatter, and seafloor character of Farallon Escarpment and Rittenburg Bank, northern California: U.S. Geological Survey Open-File Report 2014-1234, 18 p., http://doi.dx.org/10.3133/ofr20141234.

ISSN 2331-1258 (online)



Contents

Abstract

Introduction

Multibeam-Echosounder Survey Results

Seafloor Character

Acknowledgments

References


Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/2014/1234/
Page Contact Information: Contact USGS
Page Last Modified: Wednesday, December 07, 2016, 07:41:08 PM