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Open-File Report 2014–1018

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### Sea-Floor Geology in Northwestern Block Island Sound, Rhode Island 

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## Introduction

| Title PageList of FiguresConversion FactorsAbstract**Introduction**SettingMethodsBathymetrySidescan SonarSedimentsBottom PhotographyGIS Data CatalogSummaryAcknowledgmentsReferencesContactsIndexClick on figure for larger image**Figure 1.**Map showing the location of National Oceanic and  Atmospheric Administration survey H12296 offshore  of Rhode Island.
The U.S. Geological Survey (USGS) is working in  cooperation with the National Oceanic and Atmospheric Administration (NOAA) to  study the sea floor along the northeast coast of the United States,  specifically along the coasts of New York, Connecticut, Rhode Island, and  Massachusetts. Multibeam-echosounder (MBES) and sidescan-sonar data, collected  by NOAA to update hydrographic charts, can be used along with sediment samples  and still and video photography of the sea floor, collected by the USGS, to  interpret the sea-floor features and sedimentary environments. The present  study area is based on NOAA hydrographic survey H12296 in northwestern Block  Island Sound, and covers 69 square kilometers (km²) of the sea floor  offshore of Rhode Island from Watch Hill to Green Hill (fig. 1). The purpose of  this report is (1) to interpret and delineate the features and sediments on the  sea floor, and (2) to make the compiled MBES, sidescan-sonar, sediment, and  photographic data available to the public. These datasets also serve as base maps  for resource management and benthic studies. 

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U.S. Department of the Interior |            U.S. Geological Survey                                                URL: http://pubs.usgs.gov/of/2014/1018/html/intro.html            Page Contact Information: GS Pubs Web Contact                        Page Last Modified: Friday, February 21, 2014, 12:27:41 PM |
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